| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | used [to-vb] [conj] [pron] [verb] | 46 |
|
| 2 | used [to-vb] when [pron] [verb] | 16 |
|
| 3 | [modal v] [to-vb] when [pron] [verb] | 16 |
|
| 4 | [vb mod] [to-vb] when [pron] [verb] | 16 |
|
| 5 | used [verb] when [pron] [verb] | 16 |
|
