No | Pattern | Freq | Relations |
---|---|---|---|
1 | is [adj] [prep] [pron] [to-vb] | 329 | |
2 | [be] difficult [prep] [pron] [to-vb] | 117 | |
3 | be difficult [prep] [pron] [to-vb] | 117 | |
4 | [is] difficult [prep] [pron] [to-vb] | 58 | |
5 | is difficult [prep] [pron] [to-vb] | 43 | |
6 | is difficult [prep] [pron] [verb] | 43 |