1 I think Diana will pass the exam.
2 I think Jack will win the game.
3 I think Sue will like her present.
4 I think the weather will be nice tomorrow.
5 I don't think they will get married.
6 I don't think I will be at home this evening.
Объяснение:
После I think или I don't think в предложении нужно поставить will перед глаголом.