| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] what have happened to | 142 |
|
| 2 | [prep] what have happened to | 100 |
|
| 3 | [prep] what have happened to | 100 |
|
| 4 | know what have happened to | 50 |
|
| 5 | [adv] what have happened to | 43 |
|
| 6 | of what have happened to | 39 |
|
| 7 | [vb infin] what have happened to | 39 |
|
| 8 | of what have happened to | 39 |
|
| 9 | [to-vb] what have happened to | 30 |
|
| 10 | [vb past] what have happened to | 29 |
|
| 11 | [adv] what have happened to | 26 |
|
| 12 | know what have happened to | 24 |
|
| 13 | wonder what have happened to | 24 |
|
| 14 | [vb base] what have happened to | 23 |
|
| 15 | [conj] what have happened to | 23 |
|
| 16 | [coord] what have happened to | 21 |
|
| 17 | see what have happened to | 19 |
|
| 18 | about what have happened to | 17 |
|
| 19 | [adv prt] what have happened to | 17 |
|
| 20 | about what have happened to | 17 |
|
| 21 | out what have happened to | 16 |
|
| 22 | and what have happened to | 16 |
|
| 23 | and what have happened to | 16 |
|
| 24 | out what have happened to | 16 |
|
| 25 | [noun] what have happened to | 13 |
|
| 26 | [v-ing] what have happened to | 13 |
|
| 27 | be what have happened to | 12 |
|
| 28 | [be] what have happened to | 12 |
|
| 29 | to know what have happened to | 11 |
|
| 30 | at what have happened to | 11 |
|
