Unit 2 Natural disasters Grammar and usage 课件-2022-2023学年高中英语译林版（2020）必修第三册

Unit2 Grammar and usage 时态形式 主动式 被动式 一般式 to do to be done 完成式 to have done to have been done 进行式 to be doing / 否定形式在to 前加 not 功能：不定式可以做主语，宾语，表语，宾补，定语或状语。 He decided to buy a new car. The fire was thought to have started in an upstairs room. I sorry to have given you so much trouble. He seems to be worrying about something. =It seems that he is worrying about something. Don’t pretend to be working hard. Just do what you should. The students want to be sent to work in the countryside. He wanted the letter to be typed at once. I’ve already warned you not to copy other’s homework. I promised never to betray my country. 不定式做主语 It’s common for leaves to fall from the trees in autumn. It is + adj +of sb to do sth It is silly of you to trust such a man. It is selfish of him not do anything for the orphans. It’s unfair of you to say such things about her. 主语+be+adj+to do I think these problems are easy to work out, so you don’t have to ask the teacher for help. The machine is very easy to operate. Anyone can learn to use it in a few minutes. 不定式做定语 Mary was the first girl to work out the problem. This is the best way to solve the problem. Tom was the only one to know the truth. 注意：名词前有序数词或最高级或the only, the very, the only, the last, the next等修饰时，用to do 做后置定语。 Please give me a knife to cut with. The travelers finally found a temple to live in. Here is some paper for you to write on. 注意：在动宾关系中，如果不定式是不及物动词，其后面的介词不可以省略 常见可跟不定式做定语的名词有：time, place, way, reason, decision, chance, opportunity, attempt, effort, right, ability 等 He has given up the plan to buy a new car. His dream to go to college has come true at last. Is that the best way to solve the problem? He was given an opportunity to study abroad. 动词不定式做状语 常用短语搭配 only to, too……to…, enough……to……, so…as to…, such…as to.. He is too excited to say anything. The bag is too heavy for me to carry. He was brave enough to do what he wanted to. The room is big enough to seat all of us.