No | Pattern | Freq | Relations |
---|---|---|---|
1 | is [adv] difficult [to-vb] [adj] | 99 | |
2 | is [adv] difficult [to-vb] [adj] | 82 | |
3 | is often [adj] [to-vb] [adj] | 34 | |
4 | is often [adj] [to-vb] [adj] | 33 | |
5 | be often difficult [to-vb] [adj] | 11 | |
6 | [be] often difficult [to-vb] [adj] | 11 | |
7 | [is] often difficult [to-vb] [adj] | 10 | |
8 | is often difficult [to-vb] [adj] | 10 | |
9 | is often difficult [verb] [adj] | 10 | |
10 | is often difficult [to-vb] [adj] | 10 |