B2U3 Grammar 现在完成时被动语态 一．语法热身练习用括号中所给词的正确形式填空。1. The students ________ (clean) the windows of the classroom half an hour ago. 2. The students ________________ (clean) the windows of the classroom since half an hour ago.3. So far, many countries ____________ (develop) their software programs. 4. Up till now, I _________(read) the novel twice. It’s interesting.5. She ________ (go) to Pairs, hasn’t she? —Yes, she has. —How ____ she ___ (go) there? —She _____ (go) there by air.6. The boy has already ________(finish) his homework, so he went out for a walk.思考：练习 1 和 2 时态的区别：一般过去时表示动作发生在________________，其结果对现在没有影响；完成时表示动作或状态尽管发生在________________，但侧重说明该动作或状态对____________造成的影响和结果。二．现在完成时(主动语态)1. 结构：________________（根据语法热身练习 2.3.4.5 填写）2. 概念与用法：①表示过去发生或已经完成的某个动作对现在产生的影响或结果。(语法热身练习_____,______,_____,______)经常和 already, yet, just 等连用。(语法热身练习______)② 表示过去已经开始、持续到现在(可能还会继续下去)的动作和状态。（语法热身练习____）3.常与下列时间短语连用:1. for + 一段时间；since + 时间点/ 从句 2. so far, up till now, up to now,until now 迄 今 为 止 3. for/in /during the last/past …years/months/ weeks 在最近的……年/月/星期里 4.最近：recently, lately, in recent years 5. 从……以来: ever since 三．现在完成时被动语态构成句式例句构成肯定句A plan has been made.否定句My computer has not been repaired.一般疑问句Have the problem been solved yet?特殊疑问句Where has your laptop been repaired?小结：现在完成时的被动语态由________________构成，其结构有两个助动词，即 _______和_______，两者缺一不可。助动词________________必须与主语在人称和数上保持一致。1（不规则动词请看课本 P100-P102）四、现在完成时被动语态用法 [熟读深思] 仔细阅读下列句子, 归纳...
