ask有第三人称单数形式,它的第三人称单数形式是asks。
例如,the boy  usually asks  his grandfather about the book。这个男孩儿经常问他的爷爷关于这本书的情况。the student often asks his teacher for help when he is in the school。这个学生在学校经常向他的老师寻求帮助。
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