No | Pattern | Freq | Relations |
---|---|---|---|
1 | it must have [been] [prep] | 83 | |
2 | it must have [been] [prep] | 83 | |
3 | it [modal v] have [been] for | 14 | |
4 | [pron] must have [been] for | 8 | |
5 | it must have [been] for | 6 | |
6 | it must [verb] [been] for | 6 | |
7 | it must have [be] for | 6 |