英语常用语法：时态一致

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英语常用语法：时态一致
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- C7 H* b9 G* W3 U! _! u: V* d　　1)并列谓语的时态一致。
　　【例如】Yesterday I went shopping, bought some books and had dinner at a good restaurant.
　　The soldier looked at him, exchanged glances with his comrade and took out the gun.
　　2)主从复合句的时态一致。
% @6 g8 i1 |* D& c　　a)主句为现在时、将来时、现在完成时，宾语从句谓语动词时态按情况而定。
5 G: H* d! ?+ r9 K  k　　【例如】
　　I wonder what will happen tomorrow.
　　I wonder what happened to him yesterday.
: ]& _3 ~7 [: ^. u% {: z. ^　　I wonder what is happening now outside.
　　b)主句为过去时态，宾语从句一般用过去时态。如果宾语从句说明的是客观真理，用一般现在时。
　　【例如】
* W6 i& X- f' o. z+ `* U1 T　　He told me he made a big mistake.
　　He told me he would go to Beijing the next day.
: x1 z& F5 t, X6 h　　He told he had finished his task.
　　The teacher told students that the earth moves around the sun.(客观真理)
7 q6 p) M; ]/ g1 ~4 }* {( j　　3)定语从句和比较状语从句时态不受主句影响。
! q% N! U! d7 G6 z/ I8 V　　【例如】
. n, u! r. X/ d! A2 y) I  r3 Q- C　　The universityswhereshe is studying was founded in 1950.
+ s; M5 q9 @: `# o% j% p! R, @; U3 u　　You now speak English better than you spoke it last year.
　　4)时间和条件状语从句中，常用现在时表示将来。
　　【例如】
) ]/ P- }/ p, R! G% C2 N( C　　We will cancel our trip if it rains tomorrow.
　　I will go to visit the Summer Palace as soon as I arrive in Beijing.
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