| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may be used [prep] [art] | 111 |
|
| 2 | may be used [prep] [art] | 111 |
|
| 3 | may be [verb] at [art] | 111 |
|
| 4 | may be [vb pp] at [art] | 104 |
|
| 5 | [modal v] be used at [art] | 21 |
|
| 6 | may [be] used at [art] | 7 |
|
| 7 | may be use at [art] | 7 |
|
| 8 | may be used at [art] | 7 |
|
| 9 | may be used at [art] | 7 |
|
| 10 | may [be] used at [art] | 7 |
|
| 11 | may be used at [art] | 7 |
|
