Little Timmy made thatsnowmanall by himself.
Why did youleaveyourlittlebrotherby himself?
Hespentalleveningstandingawkwardlyby himself.
Iaskedmyhusbandtohelpmetidyup but then myfriendcalled, and heendedup doing it all by himself.
He is going to the barber's by himself for the firsttimetoday.