| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been going on for | 90 |
|
| 2 | [verb] been going on for | 90 |
|
| 3 | had been going on [prep] | 41 |
|
| 4 | had been [verb] on for | 32 |
|
| 5 | had been [v-ing] on for | 27 |
|
| 6 | had been going [adv] for | 25 |
|
| 7 | had [be] going on for | 23 |
|
| 8 | had been go on for | 23 |
|
| 9 | had [been] going on for | 23 |
|
| 10 | [vb past] been going on for | 23 |
|
| 11 | had be going on for | 23 |
|
