| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | know what have [vb pp] to | 51 |
|
| 2 | know what have [verb] to | 51 |
|
| 3 | know what have happen to | 50 |
|
| 4 | know what have happened to | 50 |
|
| 5 | know what had [verb] to | 29 |
|
| 6 | know what have [verb] to | 24 |
|
| 7 | know what 's [verb] to | 16 |
|
| 8 | to know what have [verb] to | 11 |
|
| 9 | knew what have [verb] to | 9 |
|
| 10 | know what has [verb] to | 5 |
|
