| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] have been [v-ing] [prep] | 1813 |
|
| 2 | should have been [v-ing] [prep] | 33 |
|
| 3 | [noun] should have been [v-ing] | 28 |
|
| 4 | [noun] should have been [prep] | 25 |
|
