| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it could [verb] | 2659 |
|
| 2 | it could [vb infin] | 2635 |
|
| 3 | it [modal v] affect | 118 |
|
| 4 | [pron] could affect | 45 |
|
| 5 | [pers pn] could affect | 17 |
|
| 6 | it could affect | 11 |
|
| 7 | it could affect | 11 |
|
