A conjunction is a word that connects other words or groups of words.
1. Tigers and lions are carnivores.
2. Let me know when you are ready.
In sentence 1, the nouns ‘tigers’ and ‘lions’ are joined together by the conjunction and.
In sentence 2, two phrases, ‘let me know’ and ‘you are ready’ are linked together by the conjunction when.
Commonly used conjunctions
and, or, so, because, as, if, but, for, since, although, yet, besides, though, still, while, however, whereas, hence, unless, moreover, till, when