| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | i [modal v] [vb infin] to be | 359 |
|
| 2 | [modal v] [vb infin] to be able | 117 |
|
| 3 | i [modal v] to be able | 27 |
|
| 4 | i [modal v] [vb infin] be able | 18 |
|
