| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] [pron] [is] [verb] | 70 |
|
| 2 | be [verb] it [is] [verb] | 58 |
|
| 3 | be [v-ing] it [be] [verb] | 28 |
|
| 4 | [be] [v-ing] it [is] [verb] | 18 |
|
