| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they have been [v-ing] [prep] | 256 |
|
| 2 | and have been [v-ing] [prep] | 50 |
|
| 3 | and they have been [v-ing] | 40 |
|
| 4 | and they have been [prep] | 14 |
|
