| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [be] [v-ing] [noun] | 585 |
|
| 2 | [vb past] it [be] [noun] | 523 |
|
| 3 | it [be] [v-ing] [noun] | 498 |
|
| 4 | [vb past] it [be] [v-ing] | 322 |
|
| 5 | [vb past] it [v-ing] [noun] | 8 |
|
