它取决于动词表达的意思和语境。
如果动词表达的是命令、要求、鼓励等意思,通常使用to作为动词的宾语,例如:
She told me to go to bed.
The teacher ordered the students to do the homework.
They invited us to have dinner with them.
如果动词表达的是为某人做某事或者为某个目的做某事的意思,通常使用for作为动词的宾语,例如:
He prepared a gift for his girlfriend.
The company launched a new product for the market.
They旅行为了放松和享受美景。
总之,to和for都是介词,但在不同的语境中,它们所表达的意思和用法不同,因此需要根据具体的语境来选择使用。
加for
因为1、不需要to是因为 谓语动词可以与宾语形成动宾结构,如 read books, write a letter.
2、使役动词、感官动词的宾补前不加to, 如: let him go不是 let him to go.