| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it has [been] [vb pp] for | 100 |
|
| 2 | it has [be] [vb pp] for | 100 |
|
| 3 | it has been [vb pp] for | 100 |
|
| 4 | it has [be] [vb pp] for | 100 |
|
| 5 | it has be [vb pp] for | 100 |
|
| 6 | it has [be] known for | 29 |
|
| 7 | it has [be] used for | 6 |
|
