| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] have been used for | 19 |
|
| 2 | it [verb] been used for | 14 |
|
| 3 | [pers pn] [vb -s] been used for | 9 |
|
| 4 | [pers pn] has been used for | 6 |
|
| 5 | [pers pn] have been used for | 5 |
|
| 6 | [pers pn] [vb base] been used for | 5 |
|
| 7 | [pers pn] [vb past] been used for | 5 |
|
| 8 | [pers pn] had been used for | 5 |
|
