| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | used [prep] [be] [verb] | 436 |
|
| 2 | we used [prep] [be] | 44 |
|
| 3 | we used [prep] [verb] | 13 |
|
| 4 | we [prep] [be] [verb] | 8 |
|
