No | Pattern | Freq | Relations |
---|---|---|---|
1 | be difficult for us [to-vb] | 24 | |
2 | [be] difficult for us [to-vb] | 24 | |
3 | [is] difficult for us [to-vb] | 17 | |
4 | is difficult for us [to-vb] | 13 | |
5 | [be] difficult for us [to-vb] | 6 | |
6 | be difficult for us [to-vb] | 6 |
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