About preposition: connected with, on the subject of

• I’m worried about you.
• They were talking about Tom.
• I got the information about the course.
• He’s worried about his job.

1. About adverb: approximately

• It’s about 10 km away.
• Their house is worth about 300,000 dollars.
• He works about 50 hours a week.

2. About adverb: almost

• They’re about ready to leave.
• He’s about ready to go.
• Take it out when it’s just about done

3. About adverb: direction

• I heard someone moving about outside.
• We walked about the room.
• I spent all day running about the head office.

4. About adverb: in or near a place

• Is there a store anywhere about?
• She must be somewhere about.

About adjective: INTENDING (be about to do sth)

• She was about to leave when I arrived.
• They were just about to vote.
• She’s about to have lunch.
• We’re about to play tennis.