| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [adv] an [noun] | 2802 |
|
| 2 | be [prep] an [noun] | 885 |
|
| 3 | [prep] [adv] an [noun] | 418 |
|
| 4 | be [prep] [adv] [noun] | 322 |
|
| 5 | be [prep] [adv] an | 43 |
|
