| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [noun] | 490659 |
|
| 2 | [be] a [noun] | 133612 |
|
| 3 | [be] [prep] [noun] | 54730 |
|
| 4 | [be] [prep] a | 17791 |
|
