他正在房间里写作业。
He is doing his homework in his room.
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is英 /ɪz/|美 /ɪz/
doing英 /ˈduːɪŋ/|美 /ˈduɪŋ/
解释
(is) 是 be 动词的第三人称单数形式，(doing) 是 do 的现在分词。is + doing 构成现在进行时，表示说话时正在进行的动作。
He is doing his homework in his room.
(is) 是 be 动词的第三人称单数形式，(doing) 是 do 的现在分词。is + doing 构成现在进行时，表示说话时正在进行的动作。