Use probably with will and won't.
Rewrite the sentences in a different way, without changing the meaning.(1-это пример)
1) I think I'll go shopping at the weekend
1)I'll probably go shopping at the weekend
2)I'm almost sure I won't buy anything
3)I don't think England will beat Brazil tonight
4)But i think it'll be an exciting match
5)I don't think I'll go out this evening
6)I think i'll stay at home

2)I probably won't buy anything ,I'm almost sure3)England will probably beat Brazil tonight 4)It'll be probably an exciting match5)I'll probably don't go out this evening 6)I'll probably stay at home