| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [to-vb] [prep] a | 500 |
|
| 2 | do be [to-vb] [prep] | 114 |
|
| 3 | do be [to-vb] a | 96 |
|
| 4 | do be [prep] a | 12 |
|
