No | Pattern | Freq | Relations |
---|---|---|---|
1 | [modal v] have [been] a | 1695 | |
2 | must have [been] [art] | 626 | |
3 | must have [been] [art] | 626 | |
4 | must have [been] a | 477 | |
5 | must have [been] a | 430 | |
6 | must [vb infin] [been] a | 430 | |
7 | must [verb] [been] a | 430 | |
8 | must have [be] a | 426 |