| Lesson 15. CERTAINTY AND UNCERTAINTY. | |
| 211 | To be honest, I’m not certain. |
| 212 | Maybe. |
| 213 | I couldn’t say for sure. |
| 214 | I couldn’t say for definite. |
| 215 | I couldn’t say absolutely. |
| 216 | I’m positive that he did it. |
| 217 | I’m certain of it. |
| 218 | I’m not sure that’s a good idea. |
| 219 | I can’t be certain of what time I left the office. |
| 220 | I’ve no idea where my shoes are. |
| 221 | I’m not certain if he’s telling the truth. |
| 222 | Are you certain this is what you want to do? |
| 223 | I swear this is the truth. |
| 224 | I have no doubt about how I feel. |
| 225 | Absolutely. |