| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be [v-ing] [prep] [art] | 1432 |
|
| 2 | be [v-ing] [prep] [art] first | 113 |
|
| 3 | [modal v] be [prep] [art] first | 21 |
|
| 4 | [modal v] be [v-ing] [art] first | 11 |
|
