| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could not [vb infin] | 21316 |
|
| 2 | not [vb infin] [adv prt] | 8317 |
|
| 3 | could [vb infin] [adv prt] | 3348 |
|
| 4 | could not [adv prt] | 7 |
|
