to do不定式开课.ppt

本节课重点提要 1. 不定式的基本形式和否定形式 2. 不定式的时态和语态 3. 不定式的复合结构 4. 不定式的基本用法 5. 不定式中常见的主动表被动 6 不定式的省略，保留符号to 7. 不带to的不定式 They advised me to give up smoking. They advised me ____ ___ ___ _____ smoking. He promised to take care of the poor He promised ___ __ ____ ___ ___ the poor 练习 Step 3 不定式的复合结构 只能接不定式作宾语的动词口诀： 决定想做计划需要同意，能做被用来做的事 迫不及待下决心做过去常常未能做的事 决定想做计划需要同意，能做被用来做的事 decide to do sth. 决定做某事 want ∕ would like to do sth. 想做某事 plan to do sth. 计划做某 need to do sth. 需要做某事 agree to do sth. 同意做某事 afford to do 能做某事 be used to do 被用来做 迫不及待下决心做过去常常未能做的事 can’t wait to do 迫不及待地要做某事 make up one’s mind to do 下决心做某事 used to do 过去常常做某事 fail to do 未能做某事 接不定式作宾语补足语的动词口诀： 请求与命令 ask sb. to do sth. 请求某人做某事 tell sb. to do sth. 命令某人做某事 想要邀请期待鼓励与建议 want sb. to do sth. 想要某人做某事 invite sb. to do sth. 邀请某人做某事 expect sb. to do sth. 期待某人做某事 encourage sb. to do sth. 鼓励某人做某事 advise sb. to do sth. 建议某人做某事 答应告诫允许提醒和帮助 promise sb. to do 答应某人做某事 warn sb. not to do sth. 告诫某人做某事 allow sb. to do sth. 允许某人做某事 remind sb. to do sth. 提醒某人做某事 help sb. (to) do sth. 帮助某人做某事 如果不定式是不及物动词或所修饰的名词是不定式的地点/工具,不定式后面须有相应的介词 We have several model bikes to choose from He is looking for a room to live in Please give me a knife to cut with There is nothing to worry about 在time place way后面的不定式常省介词 He had no place to live 1 他回家去取钥匙 2 我说了什么话使你不高兴? 3 赢了这场足球赛,我们感到自豪 Step 5 不定式中常见的主动表被动 Step6 不定式的省略，保留标志to step7 不带to的情况: 使役动词和感官动词后：一感二听三让四看 feel/ hear, listen to/ let,make, have, / look at, see, watch, notice 注意：被动态中不能省 had better(not), would rather, would rather…than, cannot but（不得不 ，必然，不能不）, can’t help but = can’t choose but do等 why not /why don’t you do sth为什么不做…? help sb.（to）do sth would you please do sth 情态动词+do 助动词+do step7 不带to