Все эти предложения уже в Present Simple.
Past Simple
1 They collected stamps
2 We spent a lot of time together.
3 She lived in a beautiful house.
Future Simple
1 They will collect stamps.
2 We will spend a lot of time together.
3 She will live in a beautiful house.
Present Continuous
1 They are collecting stamps now.
2 We are spending a lot of time together now.
3 She is living in a beautiful house.
(Глагол жить-live практически не употребляется в Continuous.Но я всё-равно написала)
1.My flat big,but isn't comfortable
2. My friends are good at tennis,but isn't at football
3.Our town is green,but isn't clean
4.You are a child,but isn't baby
5.My parents and I'm glad to see Kate,but isn't Ben
Но я ее уверена,что это верно