| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | ['s] [noun sg] [is] [v-ing] [verb] a | 6 |
|
| 2 | 's [noun] [is] [v-ing] [verb] a | 6 |
|
| 3 | ['s] [noun] [is] [v-ing] [to-vb] a | 6 |
|
| 4 | ['s] [noun] is [v-ing] [verb] a | 5 |
|
