| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who have been [v-ing] [prep] | 332 |
|
| 2 | [indef pn] who have been [prep] | 47 |
|
| 3 | [indef pn] have been [v-ing] [prep] | 41 |
|
| 4 | [indef pn] who have been [v-ing] | 35 |
|
