| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] [modal v] [not/n't] [vb infin] | 1750 |
|
| 2 | [adj] period [modal v] [vb infin] | 65 |
|
| 3 | [adj] period [modal v] [not/n't] | 15 |
|
| 4 | period [modal v] [not/n't] [vb infin] | 9 |
|
