| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] [prep] a [noun] | 4595 |
|
| 2 | be [v-ing] [prep] [noun] [conj] | 1613 |
|
| 3 | [v-ing] [prep] a [noun] [conj] | 1396 |
|
| 4 | be [prep] a [noun] [conj] | 746 |
|
| 5 | be [v-ing] a [noun] [conj] | 566 |
|
