| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they used [prep] be [verb] [prep] | 7 |
|
| 2 | they used [prep] be [vb pp] [prep] | 7 |
|
| 3 | they used [prep] be [prep] [art] | 5 |
|
| 4 | they used [prep] be [prep] [art] | 5 |
|
