They went far into the forest,his brother ____(act) as a guide为何填ing

问题描述:

They went far into the forest,his brother ____(act) as a guide
为何填ing

现在分词acting因为,这个句子,没有连词,只是逗号相连,因此,这不是复合句,只是简单句,只能有一个动词.谓语动词已经是went 了,因此,第二个动词act 要转换成非谓语动词形式.这里,act 的逻辑主语是his brother,之间是主...