1. My sister has studied French for two years.

   • My sister began studying French two years ago.

2. Mrs. Dean was one of the customers of Mr. Brown's bank. Her house was for sale.

   • Mrs. Dean, whose house was for sale, was one of Mr. Brown's bank customers.

3. Mr. Smith's company is busier in December than in any other month.

   • December is the busiest month for Mr. Smith's company.

4. Mary didn't work hard enough. She failed in her exams.

   • If Mary had worked harder, she wouldn't have failed her exams.

5. The train was delayed for twenty minutes because of the bad weather.

   • Because of the bad weather, the train was delayed for twenty minutes.

6. John only understood very little of what the teacher said.

   • John could hardly understand what the teacher said.

7. Unless someone has a key, we can't get into the house.

   • We can only get into the house if someone has a key.

8. I'm sure you didn't lock the front door. Here's the key.

   • You can't have locked the front door. Here's the key.

9. He prefers golf to tennis.

   • He'd rather play golf than tennis.

10. He is sorry now that he didn't invite Molly to his party.

    • He wishes he had invited Molly to his party.

Sentence transformation:

1. Spare the rod and spoil the child.

   • If a child isn't disciplined, they will be spoiled.

2. He didn't need to be reminded about it.

   • It wasn't necessary to remind him about it.

3. These shoes will have to be repaired.

   • They will need to be repaired.

4. I love music although I can't play any musical instrument.

   • Despite not being able to play any musical instrument, I love music.

5. "How long has it been since you left this city, Bob?"

   • He wanted to know how long it had been since Bob left that city.