Then is not a coordinating conjunction. Do not use then to join two independent clauses. Instead use and or some other coordinating conjunction.
Preferred |
Discouraged |
Click Save As and then type the name of the file. |
Click Save As then type the name of the file. |
Do not use then to introduce a subordinate clause that follows an if clause.
Preferred |
Discouraged |
If this interval expires, you must reset the timer. |
If this interval expires, then you must reset the timer. |
