连词but,however,although,though,while区别.ppt

总结归纳 but与however都表示 但是 然而 都可以引导并列句 但二者用法有些区别 1 从语义上看 but所表示的是非常明显的对比 转折的意味较however要强 2 从语法上看 but是个并列连词 而however是个连接副词 3 从语序上看 but总是位于它所引出的分句之首 而however却可位于分句之首 之中或之尾 4 从标点上说 but之后一般不使用逗号 但however则通常用逗号与句子其他部分分开 but howeverHeknowssomanydifficultiesareinfrontofhim Hewillnot giveup however while的用法1 表示对比 意为 而 然而 2 引导时间状语从句 意为 当 时候 在 期间 强调某一段时间内主句和从句的动作在同一时期发生 while从句中的动词通常是持续性动词 Heisshort whilehisbrotheristall Whilemymotherwascooking thephonerang 3 引导让步状语从句 意为 虽然 尽管 多放在句首 Whileheisalittlechild heknowsmanythingsaboutknowledge While Although Though although的用法although为从属连词 意为 虽然 尽管 引导让步状语从句 注意以下两点 1 although在大多下数情况下可与though通用 但though可用于一种不以其为首的让步状语从句 这种从句须以形容词 名词或动词 原形 等开头 整个从句须置于主句之前 这时although不能替换though Tiredthoughhewas hewentonworking 2 although though所引导的从句不能与but and so however等连用 但可以和副词yet still等连用 Although thoughheisalittlechild butheknowsmanythingsaboutknowledge Although thoughheisalittlechild heknowsmanythingsaboutknowledge 正确表达 Although thoughheisalittlechild yetheknowsmanythingsaboutknowledge 正确表达 错误表达 HaveyoubeentoNewZealand No I dliketo A tooB thoughC yetD either Idoeverysinglebitofhousework myhusband Bobjustdoesthedishesnowandthen A sinceB whileC whenD as Onecan tfeeltheair itdoesexist 2 Thechildrenwereplayingoutside Marywaswritingaletter 3 myuncleisold helooksverystrongandhealthy however while Although 用but however although though while填空 4 Thecarwasold itwasinexcellentcondition 5 Somepeoplewastealotoffood othershaven tenoughtoeat 6 Ithou