5、syforthestudentstounderstandit.While作连词(1)引导时间状语,意思是“当…时”。1.We must strike while the iron is hot.趁热打铁。2.While she was listening to the radio,she fell asleep.她听着收音机睡着了。(2)引起让步状语从句,意思是“虽然…但是….”、“尽管…但是…”(多放于句首)1.While he loves his students,he is very strict with them..虽然他爱他的学生,可是他对他们很严格。2.While the
6、se experiments are interesting and useful,it is important to remember that they may not always tell us much.虽然这些实验很有趣也有用,但是很重要的是要记住,这些实验也可能不会告诉你很多。(3)引导条件状语,意思是“只要”1.While there is life, there is hope.只要生命存在,就有希望。2.While there is a way, there is away.有志者事竟成。While作并列连词用,意思为“而,然而”,表对比。而but表转折。注意用心
7、比较体会while与but的句中用意1.Some people waste food while others haven't enough.有些人很费粮食,然而有些人却吃不饱。2.The son was having a good meal at home,while the parents were working in the fields.儿子在家吃好饭而父母却在田里辛勤劳作。2,..Teachthepastprogressiveten