| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been go on for [det] | 6 |
|
| 2 | had [been] go on for some | 6 |
|
| 3 | had [been] going on for [det] | 6 |
|
| 4 | had [been] go on for [det] | 6 |
|
