| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when it have [vb pp] | 38 |
|
| 2 | when it had [verb] | 20 |
|
| 3 | when it has [verb] | 13 |
|
| 4 | when it 's [verb] | 11 |
|
| 5 | when it have [to-vb] | 6 |
|
