| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [vb infin] [adv prt] | 930 |
|
| 2 | [not/n't] [vb infin] [adv prt] for | 238 |
|
| 3 | could [not/n't] [vb infin] for | 203 |
|
| 4 | could [vb infin] [adv prt] for | 107 |
|
