Can someone check my work for me, please.

1.Yesterday he was very busy since he had been fixing the TV from noon.

2. He left for the day before I arrived. He had been waiting for me almost a week. To regret, I couldn't come earlier.
3. When Anna entered the living room, everyone was laughing. Mr. Smith had been telling funny stories for 15 minutes.

All verbs are correct. =)

I would add "my" before "regret" in #2.

Thank you very much

You're welcome!

Of course! I'd be happy to check your work.

1. "Yesterday he was very busy since he had been fixing the TV from noon."

This sentence is grammatically correct. It is using the past continuous tense ("he was very busy") to describe an action that was ongoing in the past. The phrase "since he had been fixing the TV from noon" is using the past perfect continuous tense to describe an action that started in the past and continued up until a specific point in time. In this case, the action of fixing the TV started at noon and continued until the present moment being described (yesterday).

2. "He left for the day before I arrived. He had been waiting for me almost a week. To regret, I couldn't come earlier."

This paragraph contains a few grammatical errors. Here's a corrected version:

"He left for the day before I arrived. He had been waiting for me for almost a week. Unfortunately, I couldn't come earlier."

The first sentence is fine as it is, using the past simple tense to describe an action that happened before another action. The second sentence, however, has a couple of errors. Instead of saying "almost a week," it should be "for almost a week" to indicate the duration of time. Also, the phrase "to regret" doesn't fit in this context. You could instead use "unfortunately" to express regret about not being able to come earlier.

3. "When Anna entered the living room, everyone was laughing. Mr. Smith had been telling funny stories for 15 minutes."

This sentence is also grammatically correct. It uses the past continuous tense ("everyone was laughing") to describe an ongoing action that was happening when another action occurred. The phrase "Mr. Smith had been telling funny stories for 15 minutes" uses the past perfect continuous tense to describe an action that started in the past and continued up until a specific point in time. In this case, Mr. Smith had been telling funny stories for 15 minutes before Anna entered the room.

I hope this helps! Let me know if you have any other questions.