| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] be [verb] [prep] a [adj] | 2373 |
|
| 2 | [verb] be [v-ing] [prep] [art] [adj] | 453 |
|
| 3 | [verb] be [v-ing] [prep] a [adj] | 210 |
|
| 4 | [verb] [be] [v-ing] [prep] a [adj] | 191 |
|
