영어 문장 독해 부탁드려요ㅠㅠ

다음 문장들의 뜻과 구조를 알고 싶어요.
1. But tears help us get support and sympathy from other people.
2. This is done by sending a loud sound, which makes the earth shake.
3. If this is the style which you have learned, perhaps you should watch two Canadians talking.