| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] be [verb] when | 335 |
|
| 2 | [prep] be use [conj] | 122 |
|
| 3 | [prep] be use when | 19 |
|
| 4 | [prep] [be] use when | 19 |
|
