No | Pattern | Freq | Relations |
---|---|---|---|
1 | is [adj] [to-vb] [conj] [art] | 776 | |
2 | is [adj] [to-vb] [conj] [art] | 744 | |
3 | [be] difficult [to-vb] [conj] [art] | 107 | |
4 | be difficult [to-vb] [conj] [art] | 107 | |
5 | is difficult [to-vb] [conj] [art] | 60 | |
6 | is difficult [verb] [conj] [art] | 60 | |
7 | [is] difficult [to-vb] [conj] [art] | 60 |