【导语】英语语法让很多学生都头疼,因为复杂难懂的句式和词组有时难以记忆。英语网为大家整理了英语语法大全,希望对同学们的英语语法学习有所帮助。更多内容尽在英语网。
一、祈使句的概念和一般形式
表示请求、命令等的句子叫祈使句。它的主语是听话人(you) ,一般不需要说出来。通常以动词原形开头。祈使句末尾用惊叹号或句号,句子用降调。如:
Open the door, please. 请把门打开。
Be quiet, boys. 孩子们,安静点。
Hurry up!快点跟上。
但有时为了指明向谁请求或发出命袋子令,也可说出主语来。如:
Alice, you close your book. 艾丽期,请你把书关上。
二、祈使句的否定式
祈使句的否定式是在动词原形前加dont。如:
Dont be late again. 不要再迟到了(www.yygrammar.com)。
Please dont forget to take your medicine. 请不要忘记吃药。
Dont lets quarrel about it. (=Lets not quarrel about it. ) 我们不要为此事争吵了。
三、祈使句的强调式
Do be on time. 务必准时。
Do come early. 务必早点来。
四、区分lets与let us /sb.
Please let him in. 请让他进去。
Lets go swimming, shall we? 我们去游泳,好吗?
No, lets not. /Yes, lets. 不要去了。/我们去吧。
Let us go swimming, will you? 请你让我们去游泳,好吗?
No, youd better not. 你们最好别去。
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