Is there a future tense in English?

Grammarians say there is not a future tense, but that the meaning of future is expressed in other ways, using present tenses.

In the sentence "I will be there soon", the verb is construed as being be, and will is a modal that, in this example, conveys the sense of futurity. The future sense is reinforced in this particular sentence by soon.

In the sentence "Are you going to the game on Saturday?" the tense is described by grammarians by some such name as present continuous or present progressive. The adverbial phrase on Saturday is necessary as a marker of futurity. Without that phrase, the sentence could simply have a present sense: Pat meets Sam walking along the road and asks, "Are you going to the game?" meaning now. Then again, they may both, in the context of the previous dialogue, take the very same sentence to refer to a game in the future!

There are many examples of conveying future sense in English without the help of a dedicated tense. "I must clean out that room" could mean right now or some time in the future. It can depend on how it is said, and on the context.