| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when [pers pn] [vb -s] [been] [v-ing] for | 5 |
|
| 2 | when [pers pn] [vb -s] be [v-ing] for | 5 |
|
| 3 | when [pers pn] [vb -s] been [v-ing] for | 5 |
|
| 4 | when [pers pn] 's [be] [v-ing] for | 5 |
|
