| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [verb] [adv] [prep] a [noun] | 4005 |
|
| 2 | be [v-ing] [adv] [prep] [art] [noun] | 3331 |
|
| 3 | [be] [v-ing] [adv] [prep] a [noun] | 642 |
|
| 4 | be [v-ing] [adv] [prep] a [noun] | 642 |
|
