| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [verb] [to-vb] [prep] a [noun] | 758 |
|
| 2 | [am/are] [verb] [to-vb] [prep] [art] [noun] | 623 |
|
| 3 | [am/are] [verb] [verb] [prep] a [noun] | 144 |
|
