| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [verb] [modal v] be | 144 |
|
| 2 | [prep] [v-ing] [modal v] be | 132 |
|
| 3 | [prep] working [modal v] [be] | 8 |
|
| 4 | [prep] work [modal v] be | 8 |
|
