| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [prep] a [noun] [noun] | 1322 |
|
| 2 | [prep] a [noun] [noun] [Wh det] | 1246 |
|
| 3 | be a [noun] [noun] [Wh det] | 228 |
|
| 4 | be [prep] a [noun] [Wh det] | 118 |
|
| 5 | be [prep] [noun] [noun] [Wh det] | 29 |
|
