| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] on for [noun pl] | 33 |
|
| 2 | been [v-ing] on for [noun pl] | 29 |
|
| 3 | be going on for [noun pl] | 28 |
|
| 4 | be [v-ing] on for years | 15 |
|
