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语法
Verbs and tense B1 B2

State and action verbs

Decide when verbs describe states or actions so continuous and perfect forms sound natural.

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图解

State or action: photo or video?

Meaning first: what is the verb doing here?

                [verb in this sentence]
                         │
          ┌──────────────┴──────────────┐
          ▼                             ▼
   PHOTO = STATE                 VIDEO = ACTION
   true / exists / feels         doing / happening
   not an activity               activity in progress
          │                             │
   simple form                   be + -ing = in progress
   She owns the printer.         She is fixing the printer.

   Past → now state              Past → now action
   have + state                  have been + -ing
   I’ve known Sam for years.     I’ve been waiting for Sam for an hour.

Same word? Choose the meaning again:
   The room smells clean.       → PHOTO
   The dog is smelling my bag.  → VIDEO

Ask: is this verb a photo (state) or a video (action)? Use continuous forms for the video meaning.

Introduction

Two jobs verbs can do

English verbs can describe either an action or a state. An action is something that happens, moves, starts, stops, or changes. A state is a condition, feeling, possession, opinion, relationship, or sense that simply exists. This difference matters because continuous forms usually show actions in progress, while simple forms often carry states. She is fixing the printer shows an action happening now. She owns the printer shows a state, not an activity.
Core 语法 B1 词汇 A2 Neutral

She is fixing the printer.

The continuous form is natural because fixing is an action happening now.

语块拆解

按语块读句子，别逐词读哦。

is fixing the printer
ongoing action frame
A continuous verb phrase showing an action in progress.
整体记忆
Contrast 语法 B1 词汇 A2 Neutral

She owns the printer.

Own describes a state, so the simple form is natural.

语块拆解

按语块读句子，别逐词读哦。

owns the printer
state verb phrase
A simple verb phrase showing possession, not an action in progress.
整体记忆
Core logic

Meaning first, form second

First decide what meaning the verb has in this sentence. If the meaning is a fact, feeling, possession, opinion, need, or mental state, prefer simple forms. I need a break. Do you believe him? She doesn’t like coffee. If the meaning is an activity around the time you are speaking or around another time, use a continuous form. Right now, I’m taking a break. Continuous does not simply mean present; it means an action is in progress, temporary, repeated around now, or developing.
Core 语法 B1 词汇 A2 Neutral

I need a break.

Need is normally stative, so it uses the simple present.

语块拆解

按语块读句子，别逐词读哦。

need a break
state need frame
Need describes a present state or requirement.
整体记忆
Question 语法 B1 词汇 A2 Neutral

Do you believe him?

Believe is a mental-state verb, so the simple question form is normal.

语块拆解

按语块读句子，别逐词读哦。

Do you believe him
simple present question frame
A question about a belief state uses do plus the simple verb.
整体记忆
Negative 语法 B1 词汇 A2 Neutral

She doesn’t like coffee.

Like describes a preference, so the simple present is natural.

语块拆解

按语块读句子，别逐词读哦。

doesn’t like coffee
simple present negative frame
A negative about a preference state uses doesn’t plus the simple verb.
整体记忆
Contrast 语法 B1 词汇 A2 Neutral

Right now, I’m taking a break.

Take a break is an activity here, so the continuous form is natural.

语块拆解

按语块读句子，别逐词读哦。

Right now
time marker
Signals the present moment.
I’m taking a break
ongoing action frame
A continuous phrase showing an activity happening around now.
整体记忆
Cognitive metaphor

A photo or a video

Think of state verbs as a photo and action verbs as a video. A photo can be true at this moment without showing movement; a video shows something unfolding. The room smells clean reports a result your senses notice, like a photo. The dog is smelling my bag shows an active process, like a video. This metaphor is useful, but meaning comes first. Some verbs can be either photo or video depending on how the speaker views the situation.
Core 语法 B1 词汇 A2 Neutral

The room smells clean.

Smells describes a perceived state of the room.

语块拆解

按语块读句子，别逐词读哦。

smells clean
sense-state frame
Reports a sense result, not an active process.
整体记忆
Contrast 语法 B1 词汇 A2 Neutral

The dog is smelling my bag.

Here smell is an action: the dog is actively using its nose.

语块拆解

按语块读句子，别逐词读哦。

is smelling my bag
active sensing frame
Shows deliberate sensing as an action in progress.
整体记忆
Core pattern

States and actions in perfect forms

Perfect forms follow the same logic. Use present perfect simple for states that continue from the past to now. I’ve known Sam for years. We’ve owned this flat since 2018. Use present perfect continuous for actions that have been happening over a period and may still be unfinished, repeated, or recently visible. I’ve been waiting for Sam for an hour. They’ve been repairing the flat since May. With state meanings, perfect simple normally sounds natural; perfect continuous often sounds as if you are wrongly turning a condition into an activity.
Core 语法 B1 词汇 A2 Neutral

I’ve known Sam for years.

Know is a state verb, so present perfect simple is the natural perfect form.

语块拆解

按语块读句子，别逐词读哦。

I’ve known Sam
present perfect state frame
Present perfect simple connects a continuing state to now.
整体记忆
for years
duration phrase
Shows how long the state has continued.
Core 语法 B1 词汇 A2 Neutral

We’ve owned this flat since 2018.

Own is a state verb, so present perfect simple is preferred for duration.

语块拆解

按语块读句子，别逐词读哦。

We’ve owned this flat
present perfect possession frame
Present perfect simple shows possession continuing to now.
整体记忆
since 2018
starting point phrase
Gives the starting point of the state.
Contrast 语法 B1 词汇 A2 Neutral

I’ve been waiting for Sam for an hour.

Waiting is an activity, so present perfect continuous is natural.

语块拆解

按语块读句子，别逐词读哦。

I’ve been waiting for Sam
present perfect continuous action frame
Shows an action continuing over a period up to now.
整体记忆
for an hour
duration phrase
Shows how long the action has continued.
Core 语法 B1 词汇 A2 Neutral

They’ve been repairing the flat since May.

Repairing is an action over time, so the continuous perfect form sounds natural.

语块拆解

按语块读句子，别逐词读哦。

They’ve been repairing the flat
present perfect continuous process frame
Shows an unfinished or ongoing work process.
整体记忆
since May
starting point phrase
Gives the starting point of the action.
Contrast

Same verb, different meaning

The closest common confusion is between a state meaning and an action meaning of the same verb. Do not memorize only the verb; check the meaning. Think can mean believe, a state, or consider, an action. I think you’re right. I’m thinking about changing jobs. Have can mean possess, a state, or experience or do, an action. He has a small office. He’s having a meeting. The continuous is natural when the subject is actively doing something, not when the verb only names possession, belief, or a stable relation.
Contrast 语法 B1 词汇 A2 Neutral

I think you’re right.

Think is stative when it means believe or have an opinion.

语块拆解

按语块读句子，别逐词读哦。

I think you’re right
opinion-state frame
Think means believe, so it describes an opinion state.
整体记忆
Contrast 语法 B1 词汇 A2 Neutral

I’m thinking about changing jobs.

The continuous is natural because think means consider here.

语块拆解

按语块读句子，别逐词读哦。

I’m thinking about changing jobs
considering-action frame
Think about means consider, an active mental process.
整体记忆
Contrast 语法 B1 词汇 A2 Neutral

He has a small office.

Have is stative when it means possess.

语块拆解

按语块读句子，别逐词读哦。

has a small office
possession-state frame
Has means possesses or is provided with, so it is stative.
整体记忆
Contrast 语法 B1 词汇 A2 Neutral

He’s having a meeting.

Have can be continuous when it means experience or take part in an activity.

语块拆解

按语块读句子，别逐词读哦。

He’s having a meeting
event-action frame
Having means taking part in an event, so it is action-like.
整体记忆
Usage rules

Common state meanings and boundaries

Common state meanings include knowing, understanding, believing, wanting, needing, liking, loving, preferring, remembering, owning, belonging, costing, seeming, and depending. Sense verbs such as see, hear, smell, taste, feel, and look need extra care: they are stative when they report a perception, but action-like when someone deliberately tests, checks, or experiences something. The verb be is usually stative for identity or permanent description, but continuous be can show temporary behavior, as in being careful or being difficult. Informal speech and advertising sometimes use continuous with feelings for emphasis; treat that as marked style, not the neutral grammar.
Danger zone

Do not use continuous just because it is now

A common error is adding continuous because the situation is true now. Mistake: I’m knowing the answer. Corrected: I know the answer. Another common error is using continuous questions with mental-state verbs. Mistake: Are you understanding me? Corrected: Do you understand me? Use continuous only when the meaning is an activity: thinking about a plan, having lunch, tasting food, or looking for keys. If you mean possession, knowledge, preference, belief, or understanding, choose a simple form.
Mistake 语法 B1 词汇 A2 Neutral

I’m knowing the answer.

Know is a state verb here, so the continuous form is normally wrong.

Corrected 语法 B1 词汇 A2 Neutral

I know the answer.

Use simple present for the state verb know.

语块拆解

按语块读句子，别逐词读哦。

know the answer
simple state correction
Simple present is the natural form for a knowledge state.
整体记忆
Mistake 语法 B1 词汇 A2 Neutral

Are you understanding me?

Understand is a mental-state verb here, so the continuous question sounds unnatural in neutral English.

Corrected 语法 B1 词汇 A2 Neutral

Do you understand me?

Use the simple present question for understand when asking about comprehension.

语块拆解

按语块读句子，别逐词读哦。

Do you understand me
simple present question correction
Do plus the simple verb is the normal question form for a state meaning.
整体记忆
Summary

The practical test

Use this quick test. First, ask whether the verb shows an event you could watch unfold. If yes, a continuous form may be natural. Second, ask whether the verb describes a condition, relationship, feeling, opinion, possession, or sense result. If yes, a simple form is usually better. Third, if the time period starts in the past and continues now, choose perfect simple for continuing states and perfect continuous for continuing actions. Finally, remember that meaning can change, so test the sentence, not just the dictionary verb.
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