| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | before it [is] [verb] [to-vb] | 5 |
|
| 2 | before it [is] [verb] [verb] | 5 |
|
| 3 | before it [is] [verb] [verb] | 5 |
|
| 4 | before it [is] [vb pp] [verb] | 5 |
|
| 5 | before it is [verb] [verb] | 5 |
|
