Present perfect:
1 You have played with boys in the yard.
2 Has she cleaned the house herself?
3 I have bought a new CD!
4 He has been to USA.
Past Simple:
1 Did she play a guitar yesterday?
2 He cleaned his car two days ago.
3 Did you buy anything nice at the market?
4 I was cheerful when I was young.
Present perfect:
1 You have played with boys in the yard.
2 Has she cleaned the house herself?
3 I have bought a new CD!
4 He has been to USA.
Past Simple:
1 Did she play a guitar yesterday?
2 He cleaned his car two days ago.
3 Did you buy anything nice at the market?
4 I was cheerful when I was young.