| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] to [be] [verb] [to-vb] [det] | 5 |
|
| 2 | [is] [prep] be [verb] [to-vb] [det] | 5 |
|
| 3 | [is] [prep] [be] [vb pp] [to-vb] [det] | 5 |
|
| 4 | is [prep] [be] [verb] [to-vb] [det] | 5 |
|
