| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they could [verb] | 4234 |
|
| 2 | they could [vb infin] | 4177 |
|
| 3 | they [modal v] become | 219 |
|
| 4 | [pron] could become | 173 |
|
| 5 | [pers pn] could become | 133 |
|
| 6 | they could become | 31 |
|
| 7 | they could become | 30 |
|
