· here, whats is the contraction of what has. Happened的用法如下： 1. happened是 不及物动词,作“发生”解时,可指偶然的事故,也可指有计划或无计划发生的事。一般以事件、环境、形势等作主语,表 … Read a full guide with … · simple past tense is used to talk about actions and events that both started and ended in the past. 接下来让我们看下what happen和what happened的用法区别： 1. 词性：what happen是用原形动词happen构成的现在时短语，而what … 表示“某地 (某时)发生了什么事”，常用“sth. + happen +地点/时间”这一结构 … This is the present perfect, which is constructed using:
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· here, whats is the contraction of what has. Happened的用法如下： 1. happened是 不及物动词,作“发生”解时,可指偶然的事故,也可指有计划或无计划发生的事。一般以事件、环境、形势等作主语,表 … Read a full guide with … · simple past tense is...
