印象中在某个地方看到过不让省略but also后主语的情况但记不太清。
教材上给了这个句子:
Chinese idioms not just convey more colorful meanings but (also) make your languages vivid as well.
【答】这里的 not just ... but (also)连接两个谓语动词,主语是Chinese idioms,而不是后面省略了主语。