| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [noun] be a key | 39 |
|
| 2 | [noun sg] [noun] be a key | 32 |
|
| 3 | [noun] [noun sg] be a key | 25 |
|
| 4 | [noun] [noun] is a key | 22 |
|
| 5 | [noun] [noun pl] be a key | 11 |
|
| 6 | [noun] [noun] was a key | 11 |
|
| 7 | [noun prp] [noun] be a key | 5 |
|
| 8 | [noun] [noun] are a key | 5 |
|
