| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] be a [adj] | 23606 |
|
| 2 | [noun] be [art] key | 266 |
|
| 3 | [noun] be [art] key | 266 |
|
| 4 | [noun] be a key | 171 |
|
| 5 | [noun] [be] a key | 171 |
|
