| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [be] [verb] a [noun sg] | 1423 |
|
| 2 | [verb] [be] [v-ing] [art] [noun sg] | 1281 |
|
| 3 | [verb] [be] [v-ing] a [noun] | 546 |
|
