'5 times' is a signal word for, 'for two hours' is a signal word for ..., 'since 9 o'clock' is a signal word for ..., If we want to emphasise the duration of an action, we use ..., If we want to emphasise the result of an action, we use ..., If we want to emphasise that an action is completed now, we use ..., If we want to emphasise how we have spent our time, we use ...

EF upper intermediate 2A

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