| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [noun sg] [is] [adv] [v-ing] [verb] | 10 |
|
| 2 | a [noun] is [adv] [v-ing] [verb] | 9 |
|
| 3 | a [noun] [is] [adv] [v-ing] [to-vb] | 9 |
|
