1. 1. Боб студент (глагол). 2. Друзья Боба живут недалеко от его дома (притяжательный падеж). 3. Знать иностранный язык очень важно (глагол).
2. 1. I saw him yesterday but he didn't see me. 2. It started two hours ago. 3. She has two children. She is taking them to the Zoo. 4. I invited her to the party but she couldn't come. 5. I like them. They are very nice persons. I often go to see them. Their son is a charming baby. 6. Don't take it, it's leg is broken.