| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb -s] been [vb pp] for | 123 |
|
| 2 | it has be [vb pp] for | 100 |
|
| 3 | it [vb -s] be known for | 31 |
|
| 4 | it 's be [vb pp] for | 23 |
|
| 5 | it [vb -s] be used for | 10 |
|
