This isn't the only way to write this sentence.
You make a sentence only
No. You put only one period.
Only if the sentence is a question.
That stream is not a branch; it is only a small tributary
court only authorize mwe
The cat held his prey for only an instant.
Only ninety percent of me wants to answer this question.
The assumption was that the economy would only worsen .
Lucy and Tom only knew the reference number
The mountain cabin was ablaze for only a short time.
Well if you want to end the sentence, you would put ONLY one period. Example: I am watching T.V. you only put one period. If the word TV is in the middle of the sentence, you still do the same Example: I am watching T.V. with my mother today.
misspelled. And "That's".... you only put that.