I work from home.
The main verb carries the sentence meaning without an auxiliary.
Rakennuspalikat
Lue lause merkityskokonaisuuksina, älä sana sanalta.
Recognize main verbs, auxiliaries, and the base, -s, -ing, past, and past participle forms.
THE VERB-SHAPE RULE
No helper:
person/thing + MAIN VERB carries the grammar
She works from home.
└─ main verb gets -s
With a helper (auxiliary = helping verb):
person/thing + HELPER + main verb shape
│
├─ be → -ing
│ They are working today.
│
├─ have → past participle
│ We have worked together before.
│
└─ do / does / did / modal → base verb
Does he drive?
He can drive.
Do not mark twice:
She doesn't likes coffee. ✗
She doesn't like coffee. ✓
When a helper is present, put the grammar on the helper and use the form it asks for on the main verb.
I work from home.
The main verb carries the sentence meaning without an auxiliary.
Lue lause merkityskokonaisuuksina, älä sana sanalta.
They are working today.
Auxiliary be controls the -ing form.
Lue lause merkityskokonaisuuksina, älä sana sanalta.
She works from home.
The -s form appears in the present simple after she, he, or it.
Lue lause merkityskokonaisuuksina, älä sana sanalta.
We have worked together before.
Auxiliary have takes the past participle worked.
Lue lause merkityskokonaisuuksina, älä sana sanalta.
Maya cooks dinner.
With no visible auxiliary, the main verb carries the present-tense marking.
Lue lause merkityskokonaisuuksina, älä sana sanalta.
Maya is cooking dinner.
Auxiliary be takes the -ing form of the main verb.
Lue lause merkityskokonaisuuksina, älä sana sanalta.
Maya has cooked dinner.
Auxiliary have takes a past participle.
Lue lause merkityskokonaisuuksina, älä sana sanalta.
Maya did not cook dinner.
Did carries past time, so the main verb stays in the base form cook.
Lue lause merkityskokonaisuuksina, älä sana sanalta.
He can drive.
After a modal auxiliary, use the base form of the main verb.
Lue lause merkityskokonaisuuksina, älä sana sanalta.
Does he drive?
Does carries the present-question grammar, so drive stays base.
Lue lause merkityskokonaisuuksina, älä sana sanalta.
He is driving home.
Be + -ing forms a continuous verb phrase.
Lue lause merkityskokonaisuuksina, älä sana sanalta.
He has driven home.
Driven is the past participle used after has.
Lue lause merkityskokonaisuuksina, älä sana sanalta.
The car was driven carefully.
Be + past participle can make a passive verb phrase.
Lue lause merkityskokonaisuuksina, älä sana sanalta.
Do you do yoga?
The first do is an auxiliary; the second do is the main verb.
Lue lause merkityskokonaisuuksina, älä sana sanalta.
Yes, I do.
In a short answer, do stands for the whole verb phrase.
Lue lause merkityskokonaisuuksina, älä sana sanalta.
She doesn't likes coffee.
After doesn't, the main verb should not take -s.
She doesn't like coffee.
Doesn't carries the present negative grammar, so like stays base.
Lue lause merkityskokonaisuuksina, älä sana sanalta.
I saw that film last night.
Saw is the simple past form and can stand as the main verb.
Lue lause merkityskokonaisuuksina, älä sana sanalta.
I have seen that film before.
Seen is the past participle and normally needs an auxiliary such as have.
Lue lause merkityskokonaisuuksina, älä sana sanalta.
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