we should prevent the old trees from being cut down 还是being cutti_英语解答

we should prevent the old trees from being cut down 还是being cutting down

人气：395 ℃　时间：2020-04-08 02:08:28

解答

是being cut down,这里“树被砍”,用被动语态,构成是“be动词+动词过去分词”,此处cut为过去分词形式.