用所给单词的适当形式填空(3道)3.We often hear someone ______ (sing) in the next room.7.His brother usually does some ______ (read) in the library.4.He always ______ (leave) his home.

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用所给单词的适当形式填空(3道)3.We often hear someone ______ (sing) in the next room.7.His brother usually does some ______ (read) in the library.4.He always ______ (leave) his home.

用所给单词的适当形式填空(3道)3.We often hear someone ______ (sing) in the next room.7.His brother usually does some ______ (read) in the library.4.He always ______ (leave) his home.
用所给单词的适当形式填空(3道)
3.We often hear someone ______ (sing) in the next room.
7.His brother usually does some ______ (read) in the library.
4.He always ______ (leave) his home.

用所给单词的适当形式填空(3道)3.We often hear someone ______ (sing) in the next room.7.His brother usually does some ______ (read) in the library.4.He always ______ (leave) his home.
sing 一般状态下,就用原形
reading do some reading/listening...固定的,就用动名词
leaves 三单配合

sing 经常做用原形,一次加ing.
reading
leaves