No | Pattern | Freq | Relations |
---|---|---|---|
1 | [coord] it [be] often difficult [to-vb] | 10 | |
2 | [coord] it [is] often difficult [verb] | 10 | |
3 | [coord] it [be] often difficult [verb] | 10 | |
4 | [coord] it be often difficult [verb] | 10 | |
5 | [coord] it [be] often difficult [verb] | 10 | |
6 | [coord] it is often difficult [verb] | 9 | |
7 | but it [be] often difficult [verb] | 5 | |
8 | and it [be] often difficult [verb] | 5 |