| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [pers pn] [vb infin] [prep] | 375 |
|
| 2 | [pers pn] [vb infin] [conj] [prep] | 163 |
|
| 3 | could [pers pn] [vb infin] [conj] | 152 |
|
| 4 | could [vb infin] [conj] [prep] | 99 |
|
