| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] it [verb] [prep] | 334 |
|
| 2 | [is] it [v-ing] [prep] | 145 |
|
| 3 | [is] [pron] doing [prep] | 34 |
|
| 4 | [is] it do [prep] | 23 |
|
| 5 | [be] it doing [prep] | 7 |
|
