| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] [be] [v-ing] a | 5599 |
|
| 2 | when [pers pn] [be] [v-ing] | 3571 |
|
| 3 | when [pers pn] [be] a | 867 |
|
| 4 | when [pers pn] [v-ing] a | 6 |
|
