| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] what [is] at the | 6 |
|
| 2 | what [is] [verb] at the | 23 |
|
| 3 | what [is] happen at the | 19 |
|
| 4 | what [is] happening at the | 19 |
|
| 5 | what [is] [v-ing] at the | 19 |
|
| 6 | what [is] [adv] at the | 9 |
|
| 7 | what [is] [adj] at the | 6 |
|
| 8 | what [is] [adv prt] at the | 5 |
|
| 9 | what [is] [adj] at the | 5 |
|
| 10 | what [is] at the [noun] | 15 |
|
| 11 | what [is] at the [noun sg] | 15 |
|
