| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what used [prep] be [noun sg] | 6 |
|
| 2 | what used [prep] be [noun sg] | 6 |
|
| 3 | what [modal v] [prep] be [noun sg] | 6 |
|
| 4 | what [modal v] [prep] be [noun sg] | 6 |
|
| 5 | what [modal v] to be [noun sg] | 6 |
|
| 6 | what [vb mod] [prep] be [noun sg] | 6 |
|
