| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] be a key | 171 |
|
| 2 | [noun sg] be a key | 116 |
|
| 3 | [noun] is a key | 114 |
|
| 4 | [noun] was a key | 36 |
|
| 5 | [noun pl] be a key | 35 |
|
| 6 | [noun prp] be a key | 20 |
|
| 7 | [noun] are a key | 14 |
|
| 8 | [noun] were a key | 6 |
|
