| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [art] long period [modal v] [verb] | 6 |
|
| 2 | [art] long period [modal v] [vb infin] | 6 |
|
| 3 | [art] long period [vb mod] [verb] | 6 |
|
| 4 | a long period [modal v] [verb] | 6 |
|
| 5 | a long period [modal v] [verb] | 6 |
|
