光纤最远可以拉多少米:help stay的过去式河过去分词
来源:百度文库 编辑:中科新闻网 时间:2024/05/12 09:34:09
help stay的过去式河过去分词
help staied
过去式 过去分词
help +ed +ed
stay +ed +ed(原因,这里a是元音字母,所以不去y加ied)
helped,helped
stayed,stayed
helped,helped
stayed,stayed
help的过去式和过去分词都是helped
stay的过去式和过去分词都是stayed
同意楼上的