| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [prep] what [verb] | 10 |
|
| 2 | is [prep] what [vb -s] | 9 |
|
| 3 | is [prep] what happen | 6 |
|
| 4 | is [prep] what happens | 5 |
|
| 5 | is about what [verb] | 5 |
|
| 6 | is about what [verb] | 5 |
|
