Question

how do i make one sentence subordinate to the other.

sentence: People know they are going to have to retire. They often don't save enough money to do so comfortably.

is this correct?: although people know they are going to have to retire, they often don't save enough money to do so comfortably.

Answer 1

Yes, that's right. Using "although" as a subordinating conjunction is one of the main ways to do this.

Here's a webpage with a list of the primary subordinating conjunctions:
http://www.chompchomp.com/terms/subordinateconjunction.htm