Possibility

In your native language

English uses may, might, and could before a verb without to to express a possible event or situation. Can often describes what is possible in general or in given circumstances, rather than a guess about one event. Maybe often goes at the start of a sentence and is written as one word.

Ella might be at home.

The speaker considers this possible but does not know whether it is true.

Maybe we'll take the train.

Maybe is one word and makes the plan uncertain.

It can get cold here at night.

Can describes a general possibility, not a prediction about tonight.

In your learning language

Spanish uses poder with an infinitive, the verb's dictionary form, for what circumstances make possible. Puede que introduces a possibility with the subjunctive (subjuntivo), verb forms that present something without asserting it as a fact. Quizás and tal vez mean perhaps and allow either the indicative, the forms used to state facts, or the subjunctive, depending on how the speaker presents the possibility.

Desde aquí se puede ir a la playa en autobús.

You can get to the beach by bus from here.

Se puede describes an available option without naming a particular person.

Puede que llegue tarde; hay mucho tráfico.

I might arrive late; there's a lot of traffic.

Puede que requires the subjunctive form llegue.

Quizás está en la cocina.

Perhaps she's in the kitchen.

Quizás can be followed by an indicative form such as está; the subjunctive esté is also possible.