及物动词后面必须接宾语，比如he visited Beijing last week, visit是及物动词，Beijing是宾语；而不及物动词后面不能直接接宾语，只能用副词修饰，或者用介词+名词结构，比如I went home以及I went to school，前者home是副词，后者to school是介词+名词结构。
