| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb -s] a [noun] | 2881 |
|
| 2 | [vb -s] [v-ing] a [noun] | 221 |
|
| 3 | it [vb -s] [v-ing] [noun] | 97 |
|
| 4 | it [vb -s] [v-ing] a | 38 |
|
| 5 | it [v-ing] a [noun] | 32 |
|
