| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [adv] a | 29916 |
|
| 2 | be [prep] a | 17788 |
|
| 3 | be [prep] [adv] | 6759 |
|
| 4 | [prep] [adv] a | 6059 |
|
