| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh adv] [pron] [modal v] [be] [v-ing] | 151 |
|
| 2 | is [Wh adv] [pron] [be] [v-ing] | 130 |
|
| 3 | is [Wh adv] [pron] [modal v] [be] | 65 |
|
| 4 | is [pron] [modal v] [be] [v-ing] | 6 |
|
