This machine need__(check) once a year这题怎么填啊
问题描述:
This machine need__(check) once a year这题怎么填啊
答
need做“需要”解释的时候是实义动词,用短语need to do;做“必须要”解释的时候是情态动词,直接加动词原形,这句话用need to check