помогите пожалуйста отыскать оплошности

1. Open, a не to open. 2. There was, a не it was. 3. For, a не since. 4. To do the washing-up, a не to wash up. 5. Doesn't, a не isn't. 6. Mice, a не mouse. 7. Shouldn't ask, a не don't have to ask. 8. Sister's, a не sister. 9. He be, a не be he. 10. Don't have.