Answer — Exercise Grammar
11 - Language focus 2·Cutting Edge Intermediate - Student's Book
Câu hỏi
Write the past forms of the following verbs, where possible. Which three verbs do not have past forms? Which form is used instead?
Câu trả lời
- could
- was / were allowed to
- wasn't / weren't allowed to
- couldn't
- didn't have to
- had to
- no past form: had to
- no past form: weren't allowed to / couldn't
- had to
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