時(shí)態(tài)一致

1)并列謂語(yǔ)的時(shí)態(tài)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)主從復(fù)合句的時(shí)態(tài)一致。
　　a)主句為現(xiàn)在時(shí)、將來時(shí)、現(xiàn)在完成時(shí)，賓語(yǔ)從句謂語(yǔ)動(dòng)詞時(shí)態(tài)按情況而定。
　　【例如】
　　I wonder what will happen tomorrow.
　　I wonder what happened to him yesterday.
　　I wonder what is happening now outside.
　　b)主句為過去時(shí)態(tài)，賓語(yǔ)從句一般用過去時(shí)態(tài)。如果賓語(yǔ)從句說明的是客觀真理，用一般現(xiàn)在時(shí)。
　　【例如】
　　He told me he made a big mistake.
　　He told me he would go to Beijing the next day.
　　He told he had finished his task.
　　The teacher told students that the earth moves around the sun.(客觀真理)
　　3)定語(yǔ)從句和比較狀語(yǔ)從句時(shí)態(tài)不受主句影響。
　　【例如】
　　The universityswhereshe is studying was founded in 1950.
　　You now speak English better than you spoke it last year.
　　4)時(shí)間和條件狀語(yǔ)從句中，常用現(xiàn)在時(shí)表示將來。
　　【例如】
　　We will cancel our trip if it rains tomorrow.
　　I will go to visit the Summer Palace as soon as I arrive in Beijing.