ask做及物动词和ask for有什么区别?比如ask for nothing in return的for可以省略吗?

问下ask做及物动词时候和ask for有什么区别?意义上. ask about和ask for 有区别吗 call for和ask for的区别 look for和ask for有什么区别 ask for与ask about的区别? ask for与ask to的区别 ask 与ask for的区别 ask 与 ask for 有什么区别呢? ask for leave 和ask for a leave有什么区别 或者哪个不对 ask for a lift和ask for a ride有什么区别 ask information和ask for information 的区别和联系 request和ask for有什么区别?并举例说明