In a sentence having 2 verbs that are dependent/connected, that is, when one verb cannot exist without the other, you normally put only the first verb in the future tense. I will make sure that you don't get hurt. (make sure (you) don't get hurt; the verbs depend on each other) Compare that with the following sentence I'll go to Washington where I'll see the President.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.