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Lesson 10 Will Future for Predictions

Lesson 11 Will Future for Spontaneous Decisions

Lesson 12 Going To Future for Predictions

Lesson 13 Going To Future for Intentions

Lesson 14 Present Simple for Timetable Future

Lesson 15 Present Continuous for Future Arrangements

If you are talking about things in the future that are arranged, you can use the present continuous.

Lesson 16 Future Continuous

Lesson 17 Future Perfect