1. HAve you started? yes, I have done, since Monday;I haven' t been; for; have you seen? no, I haven;t seen; since; I have had; for ages; have you phoned him? he hasn;t left; he and Alex have gone, for two weeks.
2) I think,don't understand; means;he sometimes gets; has been; has ever given;has known; is sending;he's learning;have noticed; he becomes; sometimes forget;need.
