Here are the four types of sentences by purpose:
➲ A declarative sentence makes a statement or expresses an opinion. Use a period at
the end of a declarative sentence.
Andy Murray has a great will to win.
The commentator laughed at his own mistake.
➲ An interrogative sentence asks a question and ends with a question mark.
Are you using the saw today, Mitch?
May the other people come along with us?
➲ An exclamatory sentence expresses strong feeling and ends with an exclamation mark.
This is just the way to do it!
That is great news!
➲ An imperative sentence gives a command (strong emotion) or makes a request (mild
emotion). Use an exclamation after the imperative sentence that contains a strong
emotion, and a period after one that contains a mild emotion.
Stop that foolish talk now!
Please take the empty plate away now, Ira.