loading新概念2测 41课练习题
一、用must ,have to ,had to 填空
1、you tell us if you`re going to come.then we won`t be worried about you.
2、It was very late last night.there was no bus,so I go home by taxi.
3、He wear glasses,even when he plays basketball. 4、Tell him that he turn off all the lights before he leaves home.
5、You come and have a look at our new house some day. 6、We collect a parcel from the post office yesterday. 7、I drive to work,because our university is a long way from my home.
8、The teacher said that all the homework be done by Monday. 9、Passengers show their tickets when asked to do so. 10、You do it yourself. Nobody can help you. 二、用can或must填空
This is a street crossing. There are red and green lights at each corner. Drivers watch the lights carefully.
When there is a green light. The cars go on. When there is a red light, the cars stop.They wait until the red light changes to green. Then they proceed. Sometimes cars want to turn right or red. But they wait until the green light is showing if they want to turn left.
Some people are colour-blind. They not see the difference between red and green. These people not drive, or else there will be an accident. We keep our streets safe.
情态动词的用法 1、need的用法
1）作情态动词的用法，用于否定句中，表示“不必”，也用于表示否定意思的句子中，还可构成疑问句。
2）作及物动词的用法，need表示需要，后面可以接名称、代词、不定式、动名词和复合宾语。 2、have to的用法
1）have to 的意思接近must，但must强调说话人的意愿，而have to 强调客观上的必要性，常可以翻译为“不得不”，否定形式表示“不必”，have to 可以用于多种时态，must只有原形。