could, would, might 是情态动词还是助动词?答:primary auxiliary)和情态助动词(modal auxiliary)。基本助动词有三个:do,have和be。情态助动词基本的有十四个:may,might;can,could;will,would;shall,should;must,need,dare,used to,ought to.had better.上述两类助动词的共同特征是,在协助主动词构成限定动词词组时,具有作用词的功能。
...英语句型中什么时候应该用系动词,助动词,情态动词!你能详细点告诉我...答:Does he have coffee with his breakfast?Do not be so careless.The thief was caught in the parking lot.4. 情态动词有shall, should, will, could would,may, might,must, dare ,need, ought to 等等,其用法与助动词相同。比如:you should have reported the matter to the police.I ...