Sometimes, you need to give special emphasis to a specific part of the sentence, either because you want to make a contrast, or because it is new information you want to highlight. The so-called cleft and pseudo-cleft sentences, or it cleft and wh-cleft sentences can help you achieve those ends.
Watch these videos to see some examples of how to use them and to what effect:
EXAMPLES IN REAL CONTEXTS OF USE:
Ted Lasso- watch on YouTube
It's (not) the hope that kills you.
It's the lack of hope that comes and gets you.