| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] [vb pp] [adv prt] | 298 |
|
| 2 | could [vb infin] [adv prt] for | 107 |
|
| 3 | could [vb infin] [vb pp] for | 93 |
|
| 4 | [vb infin] [vb pp] [adv prt] for | 57 |
|
