No | Pattern | Freq | Relations |
---|---|---|---|
1 | it be difficult for [noun pl] [to-vb] | 20 | |
2 | it be difficult [prep] [noun pl] [to-vb] | 20 | |
3 | it be difficult [prep] [noun pl] [to-vb] | 20 | |
4 | it be difficult for [noun pl] [to-vb] | 20 | |
5 | it is difficult [prep] [noun pl] [to-vb] | 14 | |
6 | it was difficult [prep] [noun pl] [to-vb] | 6 |