| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | i could not be [adj] | 43 |
|
| 2 | i could n't be [adj] | 32 |
|
| 3 | i could not be sure | 23 |
|
| 4 | i could not be [adj] | 11 |
|
| 5 | i could not be certain | 7 |
|
