| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been going on for [noun pl] | 23 |
|
| 2 | have been [v-ing] on for years | 14 |
|
| 3 | has been [v-ing] on for [noun pl] | 10 |
|
| 4 | had been [v-ing] on for [noun pl] | 7 |
|
| 5 | 's been [v-ing] on for [noun pl] | 6 |
|
