Answer:
1. If it rains, we won't go to the beach.
2. Ms. Smith, who lives next door, came to borrow some sugar.
3. You must be really proud of your mother, aren't you?
Explanation:
1. The use of the comma is obligatory after introductory clauses or phrases. All the markers for the introductory clauses are always followed by a comma (if, since, while, after, because, etc.).
2. The use of the comma to offset a clause in the middle of a complete sentence is mandatory, as those clauses provide additional information to the complete sentence.
3. The use of comma to offset a clause at the end of a sentence is mandatory, in order to separate contrasting elements or to denote a pause during the speech.
"It's raining cats and dogs"
"The rain is as cold as ice"
"It's so cold, we might be in Antarctica"
"Winter is as freezing as a polar bear's home"
"The sun won't shine until it is a million years later"
These are just some idioms. These include similes and metaphors.
Here's a short story.
Kaleb walked outside. "Oh, Mom, it's raining cats and dogs- how am I going to use my kite?" He shut the door, not letting the rain come in. "Not only that- the rain is as cold as ice. It's 22 degrees!" Kaleb's mom said. "Oh no, this wasn't the right time to buy a kite. Winter is as freezing as a polar bear's home, I hate this so much!" Kaleb said. "Oh, Kaleb, don't be so sad," said Kaleb's dad. "We can find a day, maybe tomorrow. It's windy tomorrow." "Oh, be quiet! It's raining all week! It will also be cold! It's so cold, we might be in Antarctica!" Kaleb's aunt (his dad's side) said. "Oh, man," Kaleb's dad said. Kaleb sighed, and put his kite away. "The sun won't shine until it is a million years later," he said.
Brainliest...?
