| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [vb infin] to be | 7203 |
|
| 2 | [vb infin] to be [v-ing] | 464 |
|
| 3 | [modal v] to be [v-ing] | 252 |
|
| 4 | [modal v] [vb infin] to [v-ing] | 199 |
|
