| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when [pron] [vb base] [prep] | 2881 |
|
| 2 | [vb infin] when [pron] [vb base] | 347 |
|
| 3 | [vb infin] [pron] [vb base] [prep] | 291 |
|
