1) We use the present perfect simple for the definite past and the past simple for the indefinite past. a) Yes b) No 2) The auxiliary verbs for the present perfect simple are do and does. a) Yes b) No 3) We use yet for affirmative, negative and question form. a) Yes b) No 4) Between the just/already/always/never we can find the auxiliary verb and the past participle verb. a) Yes b) No 5) Just is used to talk about a recent past/a short period of time and already for a long period of time a) Yes b) No

Present perfect simple

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