| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [verb] a [adj] [noun] [to-vb] | 27 |
|
| 2 | [vb mod] [verb] a [adj] effort [to-vb] | 12 |
|
| 3 | [modal v] [verb] a [adj] effort [to-vb] | 12 |
|
| 4 | must [verb] [art] [adj] effort [to-vb] | 8 |
|
| 5 | must [verb] [art] [adj] effort [to-vb] | 8 |
|
| 6 | must [verb] a [adj] effort [verb] | 7 |
|
| 7 | must [verb] a [adj] effort [to-vb] | 7 |
|
| 8 | must [verb] a [adj] effort [to-vb] | 7 |
|
