You yourself put the answer to the question in the Question. the answer is paragraph. lol
Answer:
By seeing if there are any red lines under the words or go to tools.
Explanation:
Sometimes when you spell something wrong, there will be a red line under it. If not, and you're are not sure if it's correct, go to "tools" then select spelling and grammar then it'll give you corrections if they need to correct anything.
What is the subject about?