| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could have [vb pp] [adv prt] for | 9 |
|
| 2 | could [vb infin] [vb pp] [adv prt] for | 9 |
|
| 3 | could have [vb pp] [adv prt] for | 9 |
|
| 4 | could [verb] gone [adv prt] for | 6 |
|
| 5 | could [verb] [vb pp] on for | 5 |
|
