| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] be able [to-vb] [prep] | 251 |
|
| 2 | [vb infin] be [adj] [to-vb] [prep] | 143 |
|
| 3 | [vb infin] [be] able [to-vb] [prep] | 47 |
|
| 4 | [vb infin] be able [verb] [prep] | 47 |
|
