| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which have been [verb] on | 34 |
|
| 2 | which [verb] been [v-ing] on | 23 |
|
| 3 | which [verb] been go on | 20 |
|
| 4 | which [verb] been going on | 20 |
|
| 5 | which [vb past] been [verb] on | 14 |
|
| 6 | which had been [verb] on | 14 |
|
| 7 | which [vb -s] been [verb] on | 13 |
|
| 8 | which has been [verb] on | 13 |
|
| 9 | which [verb] been [vb pp] on | 11 |
|
| 10 | which have been [verb] on | 7 |
|
| 11 | which [vb base] been [verb] on | 7 |
|
