No | Pattern | Freq | Relations |
---|---|---|---|
1 | is [adj] [prep] [pron] [to-vb] [conj] | 22 | |
2 | be difficult [prep] [pron] [to-vb] [conj] | 13 | |
3 | [be] difficult [prep] [pron] [to-vb] [conj] | 13 | |
4 | [is] difficult [prep] [pron] [to-vb] [conj] | 7 | |
5 | is difficult [prep] [pron] [verb] [conj] | 5 |