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