What time does he usually ________ (eat) lunch?His classmate ________ (work) very hard on English

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What time does he usually ________ (eat) lunch?His classmate ________ (work) very hard on English

eat do后面加动词原型
works 第三人称单数

1 一般现在时,he 是单数要加S
2 His classmate 为单数要加S 答案为:eats works

eat 用动词原形,因为助动词已经用第三人称does了
works 第三人称单数 动词加s

eat works
第一空因为有助动词does,所以eat用原形;第二空主语单数第三人称,因此动词work须与他配合