Two spaces follow the period after
an ellipsis . . .. That’s it.
Use a period:
At the End of declarative and an imperative sentence
Examples
The sentence ends a sentence.
Tell me your name.
After an indirect question
Example
She wondered where she forgets her suitcase.
At the end of a polite request that sounds like
a question
Example
Could you see this photo.
In abbreviations
Example
U.S., Inc., Co.
As a decimal point
Example
4345.67
In front of the last quotation mark
Example
She said, “You are right.”
Outside parenthesis when they enclose only a word or fragment
Example
Phrasal verbs contain verbs and prepositions (see the appropriate
chapter).
Inside parenthesis when they enclose a complete sentence
Example
Phrasal verbs contain verbs and prepositions (they are separable
or inseparable.)
In enumeration and only after complete sentence in list
Example
She needs the following:
Books and newspapers
The dog must be in the garden.
Silence
To end figure captions even if not they are not complete
sentences
Example
Figure 13. Differential Cross Section and Radial Dose.
Ellipsis:
Ellipsis is the series of three periods. It indicates the omission
of some words in a direct speech. (It contains three periods and
four spaces.)
he declare, “Everything is all right . . ..”