| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [vb infin] [adv prt] | 1570 |
|
| 2 | could [adv] [vb infin] for | 350 |
|
| 3 | [adv] [vb infin] [adv prt] for | 347 |
|
| 4 | could [vb infin] [adv prt] for | 107 |
|
