| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [v-ing] [modal v] [vb infin] | 87 |
|
| 2 | [v-ing] [to-vb] [modal v] [vb infin] | 37 |
|
| 3 | [be] [v-ing] [to-vb] [modal v] | 25 |
|
| 4 | [be] [v-ing] [to-vb] [vb infin] | 20 |
|
| 5 | [be] [to-vb] [modal v] [vb infin] | 6 |
|
