| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] an [noun] [noun] | 9439 |
|
| 2 | be [prep] [noun] [noun] | 5260 |
|
| 3 | be an [noun] [noun] | 1536 |
|
| 4 | be [prep] an [noun] | 885 |
|
