| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [Wh adv] [pron] [be] [v-ing] [prep] | 82 |
|
| 2 | [is] [Wh adv] [pron] [be] [verb] to | 29 |
|
| 3 | [be] [Wh adv] [pron] [be] [v-ing] to | 28 |
|
| 4 | [is] [adv] [pron] [be] [v-ing] to | 27 |
|
