can - can't exercises
Auxiliary verb can (positive) - can't (negative) use
I can = I know to do something. / I know that something is possible for me.
Use can, when you ask someone to do things. Use 'can' to talk about 'possibility'. Always use can with another verb.
I can write a letter.
English can - can't exercises
can - can't with free online exercises, examples and sentences, questions and can - can't negative sentences.
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Free tutorial can - can't. English can - can't exercises. English grammar easy to learn.