walk 填写原型。 因为这句话相当于,we could do nothing ,but ---we could only walk---- slowly in the snow. walk 和 do 都受到情态动词could的管辖,在其后面要用动词原型。 也是一个固定搭配,sb. could do nothing but do sth. 意思为:某人无能为力只能做.... 希望对您有所帮助~祝学习进步~望采纳~
1. 填walk. 意思是:我们只能在雪地里慢慢行走。 2. 理由:在否定句中,but/except表示“除……之外”时,其前若有行为动词do, but / except之后跟动词原形,否则后跟to do: He did nothing but / except cry. He has no other choice but / except to leave.