| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when it [verb] | 5193 |
|
| 2 | when it [vb past] | 2232 |
|
| 3 | [conj] it failed | 102 |
|
| 4 | when [pron] failed | 88 |
|
| 5 | when it fail | 23 |
|
