Because of her poor nutrition,she's grown weaker and weaker. 这 g...答:这里的grown用的是完成时has grown,grow后面是可以直接跟形容词的,这个时候它就是系动词。常见的系动词如下:一个“是”:即be,其具体形式有am, is, are, has been, have been, had been, was, were, should be, will be等。三个“保持”:即keep, remain, stay.此外, rest, lie, ...