26/50 单选题(2分) ()1.The servant went upstairs. Soon he returned and asked.A. John to follow himB. John follow himC. John followed himD. John follows him

本题考查动词不定式的用法，核心在于掌握动词ask的正确句式结构。关键知识点是ask后面必须接宾语+不定式（即ask sb. to do sth.），其他选项因缺少不定式或时态错误而被排除。

选项分析

A. John to follow him

正确。ask后接不定式结构to do，完整形式为ask John to follow him，符合语法规范。

B. John follow him

错误。ask后直接跟动词原形follow不符合规则，缺少不定式符号to。

C. John followed him

错误。ask后不能直接跟过去式followed，需用不定式to follow。

D. John follows him

错误。ask后不能直接跟一般现在时follows，需用不定式to follow。