| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it could [verb] a | 172 |
|
| 2 | it could [vb infin] a | 172 |
|
| 3 | it [modal v] become a | 99 |
|
| 4 | [pron] could become a | 59 |
|
| 5 | [pers pn] could become a | 45 |
|
| 6 | it could become [art] | 19 |
|
| 7 | it could become a | 14 |
|
| 8 | it could become a | 14 |
|
