Here are examples of the word/phrase "strive" used in a sentence and paraphrased in a sentence...
I will always strive to win.
I will always try hard to win.
Strive or don't try at all.
Try hard or don't try at all.
No matter how difficult my situation may be, I will continue to strive.
No matter how arduous my situation may be, I will continue to try hard.
Other Examples...