could have
来源:百度知道 编辑:UC知道 时间:2024/06/27 11:44:37
The cartridge could have run our of ink.
这里 run 怎么不加 ed?
这里 run 怎么不加 ed?
run 的过去分词就是 run
属于不规则变换的
run ran run
have后面要跟动词的过去分词形式,run的过去分词是原形,ran是一般过去式,没有加ed时候
run是不规则动词
过去式为ran
过去分词为run
have 后面用过去分词
run 属于不规则变换
过去分词和原词同型。
could是情态动词
后接动词原形
所以是run
run 过去式与过去分词都是本身
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