PRESENT PERFECT SIMPLE
PRESENT PERFECT CONTINUOUS
(have) five cups of tea since we came here.
02 -- They (think) about it, but haven't quite decided yet.
03 -- I (try) to learn English for years now. I can't say I've succeeded yet.
04 -- I (wait) here all this time for somebody I know to turn up. (Süreklilik ve devam niyetinizi vurgulayınız)
05 -- I think I (wait) enough; I'm leaving now.
06 -- That book (lie about) for weeks. Haven't you read it yet?
07 -- It (snow) all day long. Frankly, I've had enough of it! I wish it would stop soon.
08 -- Hello, Ali. I haven't seen you for weeks. What (do you) all this time?
09 -- She (change) three boy friends within a month.
10 -- How long have you been learning English? (ever think you of) giving it up?