| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which have be | 6252 |
|
| 2 | which have been | 6251 |
|
| 3 | which had be | 2745 |
|
| 4 | which has be | 2075 |
|
| 5 | which have be | 1431 |
|
