非谓语句子While ( growing )grow ,ants change their forms three times.为什么这里用growing?

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非谓语句子While ( growing )grow ,ants change their forms three times.为什么这里用growing?
非谓语句子
While ( growing )grow ,ants change their forms three times.
为什么这里用growing?

非谓语句子While ( growing )grow ,ants change their forms three times.为什么这里用growing?
While ( growing )为 While ( ants are growing ),的省略,为主动、进行.即状语从句的省略 :当从句的主语和主句的主语以致,且从句谓语部分含be动词,从句的主语和be动词可以同时省略.

因为前面是while ,while 后面用进行时态

growing的逻辑主语是ants,表示主动的。非谓语中-ing表示主动,-ed表被动,to do表将来和目的。