| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] [vb base] been [v-ing] on | 13 |
|
| 2 | [noun pl] have [been] [v-ing] on | 13 |
|
| 3 | [noun pl] [vb base] [been] [v-ing] on | 13 |
|
| 4 | [noun pl] [vb base] [been] going on | 9 |
|
