睇下對定係唔對,如果唔對就correct,對就唔洗理
e.g. I (learned) English since1995. 錯-have learned
1.Peggy is talking with her cousin for two hours.
2.Paul has lost his car five months ago.
3.How long did Winnie be in the library?
4.The children just finishtheir dinner.
5.Has he done his homework yet?
6.Peter has been very fat when he was four.
唔該大家呀!!