Yes. 'Could you ask your family to come?' Is not, but 'Ask your family to come' is.
No, not necessarily a command. "Come here!" is a command. But an exclamation might indicate surprise, "You came to my party!" or strong emotion, "What a wonderful gift!"
No expansion packs have mermaid outfits, but The Family Fun stuff pack does have some costumes for girl children that are mermaid costumes
A declarative sentence is a type of declaration. While a imperative sentences issues some come of command, a declarative sentence gives a statement and ends in a period. A imperative sentence can end with a period or exclamation point.
Stop No Sit Now Come
Most witch costumes will come with some witch makeup but if you have a certain look in mind you may have to buy the certain colors to come up with your look and those may not come with it.
The best online site that sell story costumes that I have come across is partycity.com. They have a large variety of costumes to choose from and their costumes are stocked year round.
Cute dog costumes do exist in the world, and they come in a variety of styles. You can find a dog costume a your local costume store, as they have started to carry dog costumes.
Come here this instance
They get them speceially made for the movie.
You normally use an exclamation mark after a command. "Come here!" is a command.
People dress in costumes for Halloween because when Halloween was first started the Samhian city believed that it was easier for the spirits to come to Earth from the other world. And the Costumes were worn to ward off the Spirits.
Positive command: "come", negative command: "no comas".