动词时态 困难
语法 测验
用正确的助词或单词填空。4 道题，即时反馈！
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动词时态 练习句
动词时态 主题的全部 4 道题，均已填入答案并附规则说明。
They have lived here since 2010.
困难
答案：have
"Since" 表示现在完成时。
He has just arrived at the airport.
困难
答案：has
"Just" 与现在完成时连用，使用 "has/have" + 过去分词。
We have known each other for ten years.
困难
答案：have
"For" + 持续时间表示现在完成时。
She has been working here since January.
困难
答案：has
现在完成进行时第三人称使用 "has been"。