I like ... eat ice cream,but i mustn't ... eat too much ice cream.
I can ... write,but i don't like ... write.
Do you want ... go there? -No,i don't.But i must ... go there.
She wants ... watch TV,but she must ... do her homework.
I can ... help you,but i must not ... do it.

I can ... write,but i don't like ..TO  write. Do you want TO go there? -No,i don't.But i must ... go there. She wants TO watch TV,but she must ... do her homework. I can ... help you,but i must not TO do it.