РЕШИТЕ УРАВНЕНИЕ ||x|-8=7

Essay about EURO 2012

Какие слова являются грамматической основой в предложении"Человек должен знать и понимать культурное наследие своего народа"?

Пожалуйста помогите!!!!

Употребить глаголы в нужной форме в Present Perfect, Past Simple, Past Continuos, Past Perfect
1. Look! Sam (to bring) some cheese ten o clock
2. We(not to see) each other before we (to come) to the place.
3. The meeting (to bring) before he (to come) to the place.
4. How long you ( to have) this pain in your shoulder? -For about three months.
5. Jack and Jenny (to watch) television when their mother (to come )
6. Wjen my husband (to have )coffe, he (to go) to his office.
7. When I came and (to enter) the kitchenn, I (to see) that my parents (to drink) coffe.