..............Prepositions often confused............

In and Into.

In.

！Don't say: Lucy spent all the day into her room.

√ Say: Lucy spent all the day in her room.

Into.

！ Don't say: Raymond came in the room and sat down.

√ Say: Raymond came into the room and sat down.

"In" denotes position inside something, while "into" denotes motion or direction towards the inside of something.

Note: Always write preposition "into" as one word.

..............Miscellaneous examples............

The apostrophe (') misplaced with contractions.

！Don't write: Did'nt, has'nt, is'nt, are'nt, etc.

√ Write: Didn't, hasn't, isn't, aren't, etc.