you must be careful.为什么说careful没有be不能形成谓语,不是有must吗

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you must be careful.为什么说careful没有be不能形成谓语,不是有must吗
you must be careful.为什么说careful没有be不能形成谓语,不是有must吗

you must be careful.为什么说careful没有be不能形成谓语,不是有must吗
must 是情态动词后面必须有真正意义的谓语动词
must 本身不是谓语动词,行为动词或系动词做谓语,be就是系动词.

must是助动词，是语气最强烈的一种。助动词不做谓语，要有行为动词或系动词做谓语，be就是系动词。

careful是形容词没有形容词直接做谓语的

1 。在英语中，形容词不能单独做谓语，必须和系动词一起构成合成谓语。
2. must等情态动词不能单独作谓语必须和它后面的原形动词一起构成谓语。看下面的演变：You're carefull.但是不能说 You must are carefull.应该把其中的are改为原形

you must be careful you must be careful改为祈使句 You must always be careful with it . You must be _(careful) than before. you must be careful.为什么说careful没有be不能形成谓语,不是有must吗填空题 When you walk___the road,you must be careful. you must be careful when you （）the street You must be more _____next time.是careful 还是carefully You must be careful with your pronunciation.改为祈使句 you must be careful with your pornunciation.改为祈使句 You must be careful when crossing the street.改为祈使句 while___(cross)the street,you must be careful It is dangerous .You _____(must be)careful You must be careful to c_the road.It's dangerous. You must ___(be) careful (在红绿灯处） You must be careful to c___ the street. We must ___(be) careful. 同义句转换 No matter what you do,you must be careful.=Whatever you do,you ______ _____be careful.