| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [pron] [prep] [v-ing] | 99 |
|
| 2 | [be] [pers pn] [prep] [v-ing] | 81 |
|
| 3 | [is] [pers pn] [prep] [verb] | 65 |
|
