End sentences with a period, use commas to separate clauses and list items, and use apostrophes for contractions (it's = it is) and possession (Maria's).
Wrong → right
Common mistake
Corrected
Its raining today.
It's raining today.
Let's eat grandma.
Let's eat, grandma.
However , the plan failed.
However, the plan failed.
Its raining outside.
It's raining outside.
The teams's results improved.
The team's results improved.
I bought apples , oranges and , bananas.
I bought apples, oranges, and bananas.
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