| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] be a [noun sg] | 1751 |
|
| 2 | be a key [noun sg] | 379 |
|
| 3 | [vb -s] a key [noun sg] | 79 |
|
| 4 | [vb -s] be a key | 22 |
|
