问句,否定句,只要前面有助动词 does, doesn't,那么后面的实义动词不用三单,用原形
need to do 是主动意义,需要做某事 I need to buy some food 我需要买吃的
need doing,是被动意义,需要被做某事 The flowers need watering 花需要浇水.
问句,否定句,只要前面有助动词 does, doesn't,那么后面的实义动词不用三单,用原形
need to do 是主动意义,需要做某事 I need to buy some food 我需要买吃的
need doing,是被动意义,需要被做某事 The flowers need watering 花需要浇水.