conjunction

[aliii]

Hello,

I will write a text written in a book.

While we naturallly make devisions about what is and is not appropriate to say or write in a given situtation, sound judgment depends on comprehensive and unbiased..............

My guestion is:Don't we have to put to before 'write'?

....approptiate to say or to write in a given situtation...

[Tdol]

We can, but we don't have to.