| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh adv] [pron] [be] [v-ing] [prep] | 660 |
|
| 2 | [is] [Wh adv] [pron] [be] [v-ing] | 371 |
|
| 3 | [is] [Wh adv] [pron] [be] [prep] | 111 |
|
| 4 | [is] [pron] [be] [v-ing] [prep] | 99 |
|
