| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] a [noun sg] [modal v] [vb infin] | 773 |
|
| 2 | but [adj] [noun sg] [modal v] [vb infin] | 171 |
|
| 3 | but a [noun sg] [modal v] [vb infin] | 52 |
|
| 4 | but [adj] a [noun sg] [modal v] | 28 |
|
