| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could not [verb] [pron] [prep] | 549 |
|
| 2 | not [verb] [pron] [adv prt] [prep] | 494 |
|
| 3 | could not [verb] [adv prt] [prep] | 234 |
|
| 4 | could [verb] [pron] [adv prt] [prep] | 226 |
|
| 5 | could not [verb] [pron] [adv prt] | 217 |
|
