| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | required [subord] [art] [noun sg] [vb mod] | 11 |
|
| 2 | required [subord] [art] [noun sg] can | 7 |
|
| 3 | required [subord] [art] [noun sg] can | 7 |
|
| 4 | required [subord] the [noun sg] [modal v] | 7 |
|
| 5 | required before [art] [noun sg] [modal v] | 6 |
|
