| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but have been | 393 |
|
| 2 | but had been | 173 |
|
| 3 | but [vb past] been | 173 |
|
| 4 | but has been | 132 |
|
| 5 | but [vb -s] been | 132 |
|
| 6 | but [vb base] been | 76 |
|
| 7 | but have been | 76 |
|
| 8 | but having been | 11 |
|
| 9 | but [v-ing] been | 11 |
|
