Sureness about the future

100% sure
(a) I will be in class tomorrow OR I am going to be in class tomorrow
In (a): The speaker uses will or be going to because he feels sure about in his future activity. He is stating a fact about the future.
90% sure
(b) Po will probably be in class tomorrow OR Po is probably going to be in class tomorrow
(c) Anna probably won’t be in class tomorrow OR Anna probably isn’t going to be in class tomorrow
In (b): The speaker uses probably to say that he expects Po to be in class tomorrow, but he is not 100% sure. He’s almost sure, but not completely sure. Word order with probably:
(1) In a statement, as in (b): helping verb + probably
(2) With a negative verb, as in (c): probably +helping verb
50% sure
(d) Ali may come to class tomorrow, OR Ali may not come to class tomorrow. I don’t know what he’s going to do.
(e) Maybe Ali will come to class, or maybe he won’t. OR Maybe Ali is going to come to class, and maybe he isn’t.
May express a future possibility: maybe something will happen, and maybe it won’t happen. In (d): the speaker saying that maybe Ali will come to class, or maybe he won’t come to class. The speaker is guessing.
Maybe + will/be going to gives the same meaning as may. (d) and (e) have the same meaning. Maybe comes at the beginning of a sentence.
English Grammar On Android - Click Here