Can and Can't Exercises

Can and can't are the first modal verbs most learners study. Use can to talk about ability — things you are able to do: "I can swim," "She can speak French." Use can't (short for "cannot") when something is not possible or you do not have the ability: "I can't drive," "He can't come today." "Can" is also used to ask for and give permission in informal situations: "Can I use your phone?" "You can sit here."

The form is simple: can or can't + base verb (the verb with no ending). There is no change for he, she, or it — we say "she can," never "she cans." To make a question, put "can" before the subject: "Can you help me?" "Can" only works in the present tense. For the past, use "could": "I could swim when I was five." For the future, use "will be able to": "I will be able to help you tomorrow." This is a key difference to remember for exams.