| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it have been [vb pp] for | 172 |
|
| 2 | it has been [verb] for | 113 |
|
| 3 | it had been [verb] for | 65 |
|
| 4 | it have been [v-ing] for | 50 |
|
| 5 | it 's been [verb] for | 43 |
|
| 6 | it have been know for | 37 |
|
| 7 | it have been known for | 37 |
|
| 8 | it have been use for | 14 |
|
| 9 | it have been used for | 14 |
|
| 10 | it have been going for | 10 |
|
| 11 | it have been go for | 10 |
|
| 12 | it have been do for | 6 |
|
| 13 | it have been done for | 5 |
|
