| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [vb infin] [prep] [be] | 4783 |
|
| 2 | could [adv] [vb infin] [prep] | 3645 |
|
| 3 | could [adv] [vb infin] [be] | 1104 |
|
| 4 | could [vb infin] [prep] [be] | 268 |
|
| 5 | could [adv] [prep] [be] | 17 |
|
