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课件网) Unit 4 We’re Ready to Help Grammar in Use Coordinating conjunction Find the rules They should also have good communication skills and speak fluent English. Volunteering can not only offer help to others, but also bring benefits to yourself. 并列连词可用来连接两个并列的成分，如单词、短语或分句。 and和or是用得最多的并列连词，此外并列连词还包括：表示意思转折的连词，如but，yet等； 表示因果关系的连词，如 for，so 等；其他并列连词，如 not only… but also，both… and等。如： We’ve invited Lily, but she may decide not to come. Interacting with children is both rewarding and enlightening. Do you know 第页，共48页知识要点1.and的用法A and B表示“A和B”，在否定句中不用and，而要用orI bought a pen and a book.我买了一支钢笔和一本书。He can’t read or write.他不会读书和写字。在“祈使句，and＋简单句(一般将来时)”句型中，and有“那么”之意Run a little faster, and you will be the first.跑快一点，那么你就是第一。and连接两个相同的词，表示“持续，重复”I waited for hours and hours.我等了一个又一个小时。第页，共48页知识要点2.or的用法A or B表示“A或B”You can go there by bus or on foot.你可以坐公共汽车或步行去那儿。在“祈使句，or＋简单句”句型中，or有“否则”之意Hurry up, or we can’t catch up with the first bus.快点儿，否则我们赶不上第一班公共汽车。第页，共48页知识要点3.but和yet的用法but意为“但是”My uncle is old, but he looks very strong and healthy.我叔叔年龄很大，但是他看起来很强壮、很健康。not A but B表示“不是A而是B”This is not my bike but his bike.这不是我的自行车，而是他的自行车。和but一样，yet也主要用于表示转折关系，意为“但是”The tongue is not steel, yet it cuts.舌虽非钢，却可杀人。第页，共48页知识要点4.so和for的用法so意为 “因此”，表示结果Mr. Black was ill, so Miss Chen was taking his class instead.布莱克老师病了，因此陈老师替他上课。for意为“因为，由于”，表推测或补充说明理由，常放在主句之后，用逗号隔开The shop was quite new, for it had opened only the week before.这家商店很新，因为它上个星期才开业。He must be at home, for the light is still on.他一定在家，因为灯还亮着。第页，共48页知识要点5. nor的用法连接否定的并列成分，放在not,no,never等否定词后面，表示“也不”The house was never clean nor tidy.这个房子从不干净，也不整洁。与neither连用，构成neither...nor...结构（既不...也不...）I have neither time nor money.我既没时间也没钱。第页，共48页知识要点6.both...and..., either...or..., neither...nor...和not only...but also...的用法both...and...意为“两者都”Both he and his parents like playing badminton.他和他的父母都喜欢打羽毛球。either...or...意为“或者……或者……，要么……要么……”，表示在两者之间进行选择It is either too cold or too hot here.这里不是太冷就是太热。neither...nor...意为“既不……也不……，两者都不”，强调两者之中的任意一个都不The ground must be just right—neither too wet nor too dry.土壤必须正合适———既不能太湿也不能太干。( )1.Get up earlier, _____ you will be late. A. if B. and C. or D. unless ( )2. Excuse me for breaking in, _____ I have some news for you. A. so ... ...
