Only when he reached the tea-house did he realize it was the same place he'd been in last year.为什么这里的realize不用过去式呢?
问题描述：
Only when he reached the tea-house did he realize it was the same place he'd been in last year.
为什么这里的realize不用过去式呢?
答
这是一个倒用动词原装句，only位于句首，句子倒装，本句话的事态就是过去时,did.是助动词所以后面动词原形。
答
这是一个倒装句，did是助动词。
答
因为前面是only when 引导的部分倒装,已经有了助动词did了,所以后面用动词原形realise
答
本来是 he did realize did已经代表了 过去式 realize就不用啦