英语单词填空,速after my son r---- he had made a mistake,he began to

ealized,后面began有提示一般过去时。你有这样疑问,是因为看到after后面有时候直接加动词ing形式么~或者句子可以根据意思这样理my son began to cry after he realized he had made a mistake 。after 后面是一个介宾短语。当after后面直接跟动词时,动词ing形式。或者动词作动名词时候也是。