| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when it be used | 39 |
|
| 2 | when it be use | 39 |
|
| 3 | when it be use | 39 |
|
| 4 | when it is use | 28 |
|
| 5 | when it was use | 9 |
|
