| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when he [verb] to | 526 |
|
| 2 | when he [vb past] to | 416 |
|
| 3 | [conj] he wrote to | 35 |
|
| 4 | when he wrote [prep] | 31 |
|
| 5 | when he wrote [prep] | 31 |
|
| 6 | when [pron] wrote to | 22 |
|
| 7 | when he write to | 9 |
|
| 8 | when he wrote to | 8 |
|
