| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [verb] a [noun] [noun sg] | 2234 |
|
| 2 | [be] [v-ing] [art] [noun] [noun sg] | 2123 |
|
| 3 | [be] [v-ing] a [noun] [noun] | 1294 |
|
