| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what has [been] [verb] to | 26 |
|
| 2 | what has been [verb] to | 26 |
|
| 3 | what has be [verb] to | 26 |
|
| 4 | what has [be] [vb pp] to | 19 |
|
| 5 | what has [be] happening to | 7 |
|
| 6 | what has [be] happen to | 7 |
|
| 7 | what has [be] [v-ing] to | 7 |
|
