A good trick to keep track of these words is that then is usually used to indicate time. Both then and time have a letter “E” in them. Than is used to make comparisons. Both than and comparison have a letter “A” in them.

Than is used in comparisons as a conjunction (as in “she is younger than I am”) and as a preposition (“he is taller than me”). Then indicates time. It is used as an adverb (“I lived in Idaho then”), noun (“we’ll have to wait until then”), and adjective (“the then-governor”).

Then meaning ‘at that time’ We can use then to mean ‘at that time’, referring either to the past or the future. In this case, it is usually at the end of the clause: This time next week, I’ll be on a plane to Kiev.

Remember that then is usually associated with time and both words have the letter E in them. So, if you’re talking about something related to time, use then. Than is usually associated with comparisons. Notice both words have the letter A in them.

[M] [T] She’s much heavier than him. [M] [T] He can run faster than I can. [M] [T] He is taller than his father. [M] [T] It is raining worse than ever.

You both are really lucky then. Let’s say two people A and B, explains a situation (something bad) to C, and C tells them how lucky they are to escape from that bad situation. Now C responds, “You both are really lucky then.”

Then vs Than: How to Remember the Difference Than is used for comparison, and both than and comparison have the letter ‘a’ in their spellings. Then is used for time, and both then and time have the letter ‘e’ in their spellings.

Than means in comparison. An example of than used as a preposition is in the sentence, “She is taller than he is,” which means that she is the taller of the two people. Used after a comparative adjective or adverb to introduce the second element or clause of an unequal comparison. She is a better athlete than I.

When it is used at the end of the sentence it emphasize on the interference drawn like “So you came then .” Sometimes it is also used to finish off a sentence, “See you later then .” What will you do then? Than with an a can be used as a conjunction or sometimes as a preposition in sentences.

What is a Period? A period is a small dot-shaped punctuation mark that is used at the end of any sentence that is intended to make a statement. As with other punctuation marks that end sentences, the period should be placed directly behind the last letter of the last word of the sentence. When to Use Periods

The exception in this synonym distinction of than and then is when then is used in if – then clauses, in that case you just have to work your mind a little and remember that in an if – then clause, then with an e is always used. Then with an e is always used as an adverb to describe a time or sequence of a thing in a sentence.

The sentence was one of a number of basic form-types Schoenberg described through analysis; another was the period. In Schoenberg’s view, ‘the sentence is a higher form of construction than the period. It not only makes a statement of an idea, but at once starts a kind of development’ (Schoenberg 1967, p.58).”