| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] have been [v-ing] on for | 13 |
|
| 2 | which have be [v-ing] on for | 12 |
|
| 3 | [Wh det] have be going on for | 11 |
|
| 4 | [Wh det] has be [v-ing] on for | 6 |
|
