1. He has never understood his wife, so she left him.
2. Why are you upset? I'm not upset, I'm just tired.
3. Our friends go to the country every summer, but we prefer the mountain.
4. I don't understand a thing from this lesson. Can you help me?
5. My parents have never visited a foreign country.
6. Have you ever seen a tiger?
7. I didn't knew I had to call you before I came.
8. My house is large and bright.
9. I have a great difficulty in understanding this language.
10. I like taking photos and that's why I want to buy a professional camera.