Question

I am going to the bookstore_________buy some books. A. and B. to

连续两个动作，什么时候用and，什么时候用to呢？

Answer 1

表示并列时用and，表示目的时用to。
望采纳，多谢！

Answer 2

and 当表示并列的动作，或者一连串连续的动作。

to的动作有归属性

例句
she scolds and beats me。
he helps me to do my homework
he helps her mother to clean the room now.

Answer 3

I am going to the bookstore_________buy some books.
选B. to
在这个句子中, TO+动词原形, 表目的, 做目的状语.
BTW, and 是用来连接两个并列动作的时候用的.