| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [v-ing] i [verb] | 69 |
|
| 2 | [be] [v-ing] i [vb infin] | 44 |
|
| 3 | [is] [v-ing] [pron] [vb infin] | 41 |
|
| 4 | [is] [verb] i [vb infin] | 24 |
|
