| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when [pers pn] [be] [v-ing] for | 100 |
|
| 2 | [pers pn] 's [be] [v-ing] for | 69 |
|
| 3 | when [pers pn] 's [be] [v-ing] | 10 |
|
