| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] we have been [prep] | 20 |
|
| 2 | we have been doing [prep] | 19 |
|
| 3 | [noun] have been doing [prep] | 18 |
|
| 4 | [noun] we have been doing | 16 |
|
