| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what have been [v-ing] [prep] | 67 |
|
| 2 | what have been happening [prep] | 55 |
|
| 3 | what has been [v-ing] [prep] | 31 |
|
| 4 | what have been [v-ing] in | 27 |
|
| 5 | what have been [v-ing] in | 27 |
|
| 6 | what 's been [v-ing] [prep] | 25 |
|
| 7 | what have been [v-ing] to | 15 |
|
| 8 | what have been [v-ing] to | 15 |
|
| 9 | what had been [v-ing] [prep] | 11 |
|
| 10 | what have been [v-ing] on | 6 |
|
| 11 | what have been going [prep] | 6 |
|
| 12 | what have been [v-ing] on | 6 |
|
