| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | before it could [verb] | 39 |
|
| 2 | before it could [vb infin] | 39 |
|
| 3 | before it could [verb] | 39 |
|
| 4 | before it could take | 5 |
|
| 5 | before it could take | 5 |
|
