No | Pattern | Freq | Relations |
---|---|---|---|
1 | [is] difficult [prep] us [verb] | 17 | |
2 | [is] difficult [prep] us [to-vb] | 17 | |
3 | [is] difficult [prep] us [verb] | 17 | |
4 | [is] difficult for us [verb] | 17 | |
5 | [is] difficult for us [verb] | 17 | |
6 | is difficult [prep] us [verb] | 13 |