| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be [v-ing] [prep] the | 975 |
|
| 2 | [modal v] be back [prep] the | 123 |
|
| 3 | [modal v] be [v-ing] back [prep] | 81 |
|
| 4 | be [v-ing] back [prep] the | 33 |
|
