There aren't any spaces after the apostrophe in a contraction (did you see what I did?)
Don't leave any space after the apostrophe when forming a contraction.
One space is sufficient.
two should be left
Only one space follows a semicolon.
no spaces
none
In standard usage, there should be no space after an apostrophe that shows omission (''). The apostrophe serves as a punctuation mark and should directly connect to the next character without a space in between.
Don't leave any space after the apostrophe when forming a contraction.
The number of spaces that follow an abbr. is one.
None!
There should be one space.
One space follows a period after an initial.
One space is sufficient.
two should be left
There is no fixed number. Do whatever appeals to you (within reason).
Only one space follows a semicolon.
's is used to refer to singular possession.No apostrophe and then an 's' indicates a plural.Be careful about possessive pronouns, though! They're a big exception to the standard English rule that an apostrophe indicates possession. Hers, yours, and especially itscause a lot of confusion because they're among the few possessives that never use an apostrophe. Many people mistakenly use it's as a possessive because of the apostrophe, but it's (!) actually a contraction of it is.