| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [verb] what is happening [prep] | 12 |
|
| 2 | [adv] [vb infin] what is happen [prep] | 10 |
|
| 3 | not [verb] what is happen [prep] | 6 |
|
| 4 | [not/n't] [verb] what is happen [prep] | 6 |
|
| 5 | [adv] [verb] what is happen to | 6 |
|
| 6 | [adv] [verb] what is happen [prep] | 6 |
|
| 7 | not [verb] what is happen [prep] | 5 |
|
