记住100句典型语法改错例句，彻底弄清18个语法概念

七、情态动词

41.He can be at home now because the light in his room is still on.

表特别有把握的肯定判断时用must，表特别有把握的否定判断时用can，can表判断时只用在否定句中。因此把can改为must。

42.He need come here before the meeting begins.

作情态动词时need用在否定，疑问和条件句中，不能用于肯定句中，而作实意动词时则可以，所以应改为：He needs to come here before the meeting begins.

43.He used to get up very early in the morning，and now he is still doing so.

used to 用来表示过去常常做某事而现在不了，所以应把后半句改为；but now he is not doing so.

44.I needn't come yesterday because all the work had been finished.

由于情态动词本身不体现时态，所以在谈论过去的事情时在情态动词后加have done，因此在needn't后加have。

45.You hadn't better stay up too late because you have to get up early tomorrow.

had better 的否定在better 后面加not.

十七、There Be句型

97.There are a bag and several books on the table.

There be 句式遵循谓语动词就近原则，a bag为单数，所以把are改为is。

98.There were several people stood at the back of the room.

There be句式的谓语动词为be动词，句中其他的动词应为非谓语动词。所以把stood 改为standing.

十八、修饰语在居中的位置不当

99.We almost have written twenty compositions this term.

像almost这样的副词在句中放在助动词、be动词之后，实意动词之前。因此把almost放在have后面。

100.The girl has beautiful，silky hair who lives high in the mountains.

定语从句应紧跟先行词，所以改为：The girl，who lives high in the mountains，has beautiful，silky hair.

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