Do you know who( )math this term?1.teach they 2.teaches their 3.teach their 4.teaches them请说明考点并翻译,

Question

Do you know who( )math this term?1.teach they 2.teaches their 3.teach their 4.teaches them
请说明考点并翻译,

Answer 1

答案：4.teaches them
考点：代词各种形式的具体用法和主谓一致.
翻译：你认为这学期谁会教他们数学呢?
解析：they为主格代词,在句中只作主语,不作宾表,表语,故1不对；their是形容词的物主代词,在句中作定语,后必须带一个名词,math作teach的直接宾语,故2不对；who来作主语时,如果没有上文限制或提示,一般当作第三人称单数来看待,谓语动词应用第三人称单数,故3不对.
另：teach sb.sth.教某人某物/某事