下面通过needn't和mustn't句式举例区分区别:
(1)You mustn’t drive fast. There is a speed limit here. 你不能开快车,这地方有速度限制。
(1-1)You needn’t drive fast. We’ve plenty of time. 你不必开得快,我们有足够的时间。
(2)You mustn’t strike a match. This room is full of gas. 你不能划火柴,这屋里满是煤气。
(2-2)You needn’t strike a match. I can see well enough. 你不用划亮火柴,我可以看清。
例句:
If you can lend me the money I needn’t go to the bank. 如果你能借给我钱,我就不必去银行了。
I’m in no hurry. He needn’t send it by air. He can send it by sea. 我不着急。他不必用航空寄来。海运过来就行。
He has a weak heart and must not exercise too hard. 他心脏很弱,不能做强烈的运动。
Our school has a rule that students must not eat or drink in class. 我们学校规定,学生不许在课上吃喝。
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