С! : use the verbs in brackets in the present perfect continuous tense. 1. david and mary (go) out together now for nearly five years 2. we have no idea how long they (swim) for, but is has certainly been longer than an hour now. 3. how long (work) at the library? 4. just look at thouse trousers. what on earth (you/do)?
2. have been swimming
3. нет подлежащего
4. you have been doing