Gramatica ingles

PRESENTE PROGRESIVO
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The present progressive tense takes the form be + V ing.The form of be is determined by the subject of the sentence.He is singing.She is listening.They aresleeping.I am going home.In English, the present progressive is used to indicate actions happening at the time of speaking, or right now.Jake is speaking to his mother right now.Please keep quiet. Thebaby is sleeping.The present progressive can also be used to indicate actions occurring over a period of time which includes the present.I'm taking five classes at the university.Grace is working at achemical factory.What are you doing these days?The present progressive is sometimes used to indicate ongoing, developing, imminent or future actions.OngoingDon't bother Mr. Grumpy while he is watchingthe football game.DevelopingI'm beginning to like this place!ImminentA: Honey, where are you?B: I'm coming. Just let me put on my shoes.Future (Note the presence of future time words.)A: Are you goingto the concert this weekend?B: I wish I could, but I'm meeting an important client from Oklahoma.Some non-action verbs do not occur in the present progressive tense. The simple present is sufficient.|

CAN and CANT
Can is a modal verb.
Can is used to express ability or to say that something is possible.
Can is the same for all subjects. We don't add an 'S' in the third person (like otherverbs)
The verb that comes after Can is in the infinitive without to:
* I can speak Spanish. (= it is possible for me to speak Spanish = I have the ability to speak Spanish)
* He can swim well.* We can see my neighbour in the garden.
* They can play the guitar.

Negative
To form the negative we add "not" after can to form one word: cannot.
We can also contract the negative toform can't. (can't = cannot)
* I cannot play the piano. We can't go to the cinema tonight.
* She cannot speak French very well. He can't drive a car.

Questions
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