when/ while后面可以直接跟分 as则不能,as后面可以直接跟谷 词,when/ while则不能。 1) As a boy, he taught himself many things 2)When/While playing there, we saw many birds
when/while后面可以直接跟分词， as则不能，as后面可以直接跟名 词，when/while则不能。 1）As a boy, he taught himself many things. 2)When/While playing there, we saw many birds
注意: When/ while都可做并列连词连接并列 句,when表示“就在这时”,常用于 was/ were doing…when had(not)(just)done. when was/were〔just) about to do…When. was/were on the point of doing . when while则表示转折“然而”(强烈的对比) =whereas
注意: when / while都可做并列连词,连接并列 句,when表示 “就在这时”，常用于 was/were doing …when… had(not) (just) done…when… was/were (just) about to do …when…= was/were on the point of doing…when while则表示转折“然而”（强烈的对比） =whereas
II was walking in the street when (Suddenly )someone patted me on the shoulder from behind 我正在街上走着就在这时忽然有人从后面 拍我的肩膀。 2. My father was cooking while my mother was playing cards. 我爸爸在做饭而我妈妈在打牌
1. I was walking in the street when (suddenly )someone patted me on the shoulder from behind. 我正在街上走着,就在这时忽然有人从后面 拍我的肩膀。 2. My father was cooking while my mother was playing cards. 我爸爸在做饭而我妈妈在打牌
3Whe表示“尽管”“虽然”时的用法( 时它引导的不是时间状语从句,而是让步状 从句,此用法许多同学并不熟悉,值得注意! I really dont like art, I find his work impressive.(山东卷) A as B Since C If D. while 答案选D。 while在此表示“尽管”“虽然 2)While the work was difficult, it was interesting.尽管工作有难度,但很有趣。 3)While i understand what you say, I cant gree with you.虽然我理解你的意思,但我还 是不同意。 这时 while要放在句首= although)
• 3.while表示“尽管”“虽然”时的用法（此 时它引导的不是时间状语从句，而是让步状语 从句，此用法许多同学并不熟悉，值得注意！） • 1）______ I really don’t like art, I find his work impressive. (山东卷) • A. As B. Since C. If D. While • 答案选D。while在此表示“尽管”“虽然” ， • 2)While the work was difficult, it was interesting. 尽管工作有难度，但很有趣。 • 3) While I understand what you say, I can’t agree with you. 虽然我理解你的意思，但我还 是不同意。 • （这时while要放在句首=although)
4when也有“尽管/然”的意思,这 的从句要放在句尾。 DThey kept trying when they knew was hopeless。 2)I am sure we can succeed when we admit we have a long way to go. When还有“既然”的意思表原因 1) Why do you want a new job when you have got such a good one? 2)It was foolish of me to take a taxi when I could easily walk there
4.when 也有“尽管/虽然”的意思，这时 的从句要放在句尾。 • 1)They kept trying when they knew • it was hopeless. • 2)I am sure we can succeed when we admit we have a long way to go. • when还有“既然”的意思表原因 • 1）Why do you want a new job when you have got such a good one? • 2)It was foolish of me to take a taxi when • I could easily walk there