all my family get together and have a dinner,和people get together to raise money for project hope

问题描述:

all my family get together and have a dinner,和people get together to raise money for project hope
这两个句子的两个动用都是并列发生的,为什么第一句用 and连接两个动词,第二句用to连接两个动词?

and表示一起做,to表示目的