WILL AND MIGHT 1- BOTH ARE MODAL VERBS 2- BOTH ARE USED FOR FUTURE PREDICTIONS 3- MAIN DIFFERENCE : WILL: When you are certain/ sure that something is going to happen I Will be happy when we get home MIGHT: When you think is possible that book might help you with your project * We also you WILL for spontaneous or immediate decicions There's been an accident, I Will call an ambulance I Will have a sandwich and an orange juice, please * We can use May with the same meaning of Might. However, we can contract might not to mightn't BUT not may not to mayn't --- mayn't IS INCORRECT IN ENGLISH