| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [subord] this have been | 160 |
|
| 2 | [subord] this has been | 99 |
|
| 3 | [subord] this had been | 59 |
|
| 4 | once this have been | 34 |
|
| 5 | if this have been | 31 |
|
| 6 | although this have been | 26 |
|
| 7 | when this have been | 16 |
|
| 8 | as this have been | 11 |
|
| 9 | where this have been | 8 |
|
| 10 | though this have been | 7 |
|
| 11 | whether this have been | 6 |
|
