（1）we mustn't buy things we （don't need）和No,I （needn't ）这两个可以互换吗?为什么.（2）she didn't have to find them .They found her 这里的didn't have to 和needn't have 互换吧.那这句话的言外之意是什么.是她

英语翻译We mustn't buy _____ _____ _____ fur. “We mustn't buy things we DON'T need.”这个句子是什么从句? 情态动词must与need可能互换吗?新概念第二册41课,我觉得need与must可以互换,换了意思一样,我列出来：1,you needn't (或mustn't) be so rude about it2,We mustn't (或needn't) buy things we don't need.3,You needn't (或mustn 情态动词must与need可能互换吗?新概念第二册41课,我觉得need与must可以互换,换了意思一样,我列出来：1,you needn't (或mustn't) be so rude about it2,We mustn't (或needn't) buy things we don't need.3,You needn't (或mustn （1）we mustn't buy things we （don't need）和No,I （needn't ）这两个可以互换吗?为什么.（2）she didn't have to find them .They found her 这里的didn't have to 和needn't have 互换吧.那这句话的言外之意是什么.是她 we mustn't cut down forests.(改为祈使句） 1、根据括号部分提问：We mustn't （play with fire）.1、根据括号部分提问：We mustn't （play with fire）.2、换种方式,意思不变：Don't start campfires! we mustn't do that again 1.Mary is good at English.(同义转换）Mary____ ____ ____English.2.We must look after animals well.(同义转换)We must____ ____ ____ ____animals.3.Must we buy the tickets for the films?No,you_____.A.may not B.needn't C.mustn't D.can't To buy a ticket,you ___line up at this window（must mustn't与have to选一）急! What we need is___the animals.We mustn't wast time. （选择）Why don't we buy ( （any/some)ji We mustn't buy things we____ A.needn't B.need not C.don't need D.haven't need 这句话为什么不选A选C,区别是什么,为什么A是错的. We mustn't buy things we____ A.needn't B.need not C.don't need D.haven't need 这句话为什么不选A选C,区别是什么,为什么A是错的 选词填空!We（ ）pick the flower in the park.A.can’t B.don't C.mustn’t We （）tell her about it .She may have known it.A.don't have to B.mustn't we什么work hard用must或mustn‘t填 At home,we mustn't cook food w_______ adults.