| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it have been used for | 14 |
|
| 2 | [pers pn] has been used for | 6 |
|
| 3 | [pers pn] have been used for | 5 |
|
| 4 | [pers pn] had been used for | 5 |
|
