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Do this simple exercise in order to understand.
Answer these questions in complete sentences. Answers will be in the present perfect tense.
Complete the sentences in the present perfect tense with the help of the verbs given in brackets.
Complete these sentences using the simple past or the present perfect tense of the verbs given in brackets.
Rewrite these sentences in the present perfect or present perfect continuous tense of the verbs given in brackets.
Rewrite these sentences using the past perfect tense/past tense of the verbs given in the brackets.