原帖由 飘雪寒冰 于 2006-7-25 20:27 发表 6 P# F% b8 L; R: A! D2 H7 \$ y"i haven't thought about it yet.. " 1 q, L R# P, z3 u2 C0 D2 X " z( Z. Q) Y3 Z1 F7 b7 jI always can't use the sentences like this.
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That's just my English teacher told us to do .
you know that practise makes perfect' e# y' G8 v) E' G
and you can use simple past tense as weill一般过去时 ) K. M; Q4 P- F$ P' acuz Americans seldom use perfect tense完成时 3 h) H8 P( u1 C2 }: H* E" l( Cit's OK