| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it have been [v-ing] for [art] | 12 |
|
| 2 | it have been [v-ing] for a | 9 |
|
| 3 | it have been [v-ing] for a | 8 |
|
| 4 | it 's been [v-ing] for [art] | 7 |
|
