| Catherine is at the theatre. | Are you? I thought you drank something. |
| Ross Roth is thirty-three. | Is he? I thought she was at the Roth’s. |
| It’s Samantha’s birthday today. | Is he? I thought he was thirty. |
| I’m so thirsty. | Is she? I thought she was thirty-three. |
| The Roth’s house is north of here. | Is it? I thought it was last month. |
| Mrs Roth is thirty. | Is it? I thought it was worth 300,000. |
| The Roths’ house is worth 600,000. | Is it? I thought it was south. |