| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when it [vb -s] [vb pp] [det] | 9 |
|
| 2 | when it [vb -s] [vb pp] [det] | 9 |
|
| 3 | when it 's [vb pp] [det] | 5 |
|
