�。ㄕ`）He had been to Europe many years ago.

　�。ㄕ�）He went to Europe many years ago.（在上下文沒有同過去某時或某個動作相比較而表示過去的意思，不可用過去完成時，而要用一般過去時。）

　　2.中文：她穿著藍色上衣，看上去很可愛。

　�。ㄕ`）She was wearing a blue dress and was looking very pretty.

　�。ㄕ�）She was wearing a blue dress and looked very pretty.（表示看上去的look是系動詞，不用進行時。）

　　3.中文：我去看他們的時候他們在吃晚餐。

　�。ㄕ`）They had supper when I went to see them.

　�。ㄕ�）They were having supper when I went to see them.（他們在吃晚餐是在過去我去看他們的時間某一點上正進行的動作，應(yīng)用過去進行時。）

　　4.中文：她兩個月前去澳洲了，她許多年前到過那里。

　　（誤）She went to Australia two months ago. She has been there many years before.

　�。ㄕ�）She went to Australia two months ago. She had been there many years before.（many years before是從過去的某時之前算起的，表示過去的過去，要和過去完成時連用。）

　　5.中文：他們問發(fā)生什么事了。

　�。ㄕ`）They asked what happened.

　　（正）They asked what had happened.（主句是一般過去時，從句的動作發(fā)生在它之前，用過去完成時。）

　　6.中文：從戰(zhàn)爭開始時他就一直在那里工作。

　�。ㄕ`）He has worked there since the war has begun.

　�。ㄕ�）He has worked there since the war began.（since引導(dǎo)的從句表示過去的某時間點，應(yīng)用一般過去時。）

　　7.中文：昨晚我寫了一封信，今晨寄出了。

　�。ㄕ`）I was writing a letter yesterday evening and posted it this morning.

　　（正）I wrote a letter yesterday evening and posted it this morning.（進行時表示進行，一般過去時表示完成，所以應(yīng)用 wrote.）

　　8.中文：他去年離開家我就一直沒有見過他。

　�。ㄕ`）He left home last year and I did not see him since.

　�。ㄕ�）He left home last year and I haven't seen him since.（since后面省去的是he left home last year，前面的句子要用完成時。）