| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] been going on for [adj] | 16 |
|
| 2 | has been going on for [adj] | 13 |
|
| 3 | [vb -s] been going on for [num] | 8 |
|
| 4 | [vb -s] been going on for [det] | 8 |
|
