简单句：主语+及物动词+宾语+宾语补足语He likes to watch the boys pla

问题补充：

简单句：主语+及物动词+宾语+宾语补足语He likes to watch the boys playing football. to watch 是不是 非谓语啊?这句话的句子成分和上面的结构匹配?

答案：

to watch 非谓语

与上面的结构相匹配.

he (主语)likes(谓语) to watch the boys(宾语)playing football(宾补)