| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has been going on [prep] | 68 |
|
| 2 | [verb] been going on at | 9 |
|
| 3 | have been going on at | 9 |
|
| 4 | has been [verb] on at | 8 |
|
| 5 | [vb -s] been going on at | 7 |
|
| 6 | has [be] going on at | 6 |
|
| 7 | has been going [adv] at | 6 |
|
| 8 | has be going on at | 6 |
|
| 9 | has been [v-ing] on at | 6 |
|
| 10 | has [been] going on at | 6 |
|
| 11 | has been go on at | 6 |
|
