| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [Wh det] it have [been] [v-ing] | 7 |
|
| 2 | [prep] [Wh det] it have [been] [v-ing] | 7 |
|
| 3 | [Wh det] it have [been] [v-ing] [prep] | 6 |
|
| 4 | [Wh det] it have [been] [v-ing] [prep] | 6 |
|
| 5 | [Wh det] it have [been] [v-ing] for | 5 |
|
| 6 | [Wh det] it have [been] [v-ing] for | 5 |
|
