i'm happy hear from you.i got yor letter yesterday hear要变为过去式吗
问题描述：
i'm happy hear from you.i got yor letter yesterday hear要变为过去式吗
答
应该用to hear
固定搭配：be happy to do sth 很高兴做某事
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答
i'm happy to hear from you. i got your letter yesterday
答
应该用to hear
固定搭配：be happy to do sth 很高兴做某事
答
happily hearing