| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been go on for a | 8 |
|
| 2 | have [been] go on for a | 8 |
|
| 3 | have [been] going on for a | 8 |
|
| 4 | has [been] go on for a | 6 |
|
