The first letter of every sentence is capitalized, regardless
of the part of speech of the opening word.
The ball bounced.
Jogging is an excellent way to stay in shape.
Purple flowers lined the tree-shaded lane.
Note: Capitals are only used to begin sentences, not independent
clauses set off by semicolons or colons. The only time a capital
follows a colon is if the colon is introducing a full-sentence
the section on quotation marks for examples.)
Wrong: Love is a wonderful thing; Don't throw it