Present perfect simple or continuous
Present Simple, Present Continuous, Past Simple, Past Continuous and Present Perfect Simple - 2
Present perfect simple vs present perfect continuous
Present Simple, Present Continuous, Past Simple, Past Continuous and Present Perfect Simple
Present perfect vs perfect continuous
Robin: I think the waiter (forget)us. We (wait)here for over half an hour and nobody (take)our order yet.
Michele: I think you're right. He (walk)by us at least twenty times. He probably thinks we (order, already)
Robin: Look at that couple over there, they (be, only)here for five or ten minutes and they already have their food.
Michele: He must realize we (order, not)yet! We (sit)here for over half an hour staring at him.
Robin: I don't know if he (notice, even)us. He (run)from table to table taking orders and serving food.