be動詞后面的動詞形式有三種可能：-ing:現(xiàn)在進(jìn)行時(shí),I'm trying to give you the right answer.-ed:被動語態(tài),I'm told that you don't know her.to do:1.表示按計(jì)劃或安排要做的事.例如：They said goodbye,little kn...