have to do sth 和be free to do sth 用法？

have to do sth ，不得不做某事
It pains her to have to go there.
不得不去那儿使得她很烦恼。
be free to do sth 有空做某事
People should be free to use whatever ingredients they wish.
人们应该能够自由使用他们想要的任何配料。

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