| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] not [verb] [pron] [adv prt] [prep] | 211 |
|
| 2 | could not [verb] [pron] [adv] [prep] | 102 |
|
| 3 | could [adv] [verb] [pron] [adv prt] [prep] | 82 |
|
| 4 | could not [verb] [pron] [adv prt] [prep] | 58 |
|
