| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | begin [to-vb] [prep] | 3139 |
|
| 2 | [is] [to-vb] [prep] | 2376 |
|
| 3 | [is] begin [to-vb] | 377 |
|
| 4 | [is] begin [prep] | 69 |
|
