| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] be used at [det] time | 6 |
|
| 2 | [modal v] be used at [det] time | 6 |
|
| 3 | be used at [det] time [prep] | 6 |
|
| 4 | be used at [det] time [prep] | 6 |
|
