No | Pattern | Freq | Relations |
---|---|---|---|
1 | must have [be] [vb pp] [prep] [det] | 18 | |
2 | must have [been] [vb pp] [prep] [det] | 18 | |
3 | must have be [vb pp] [prep] [det] | 18 | |
4 | must have been [vb pp] [prep] [det] | 18 | |
5 | must have [be] [vb pp] [prep] some | 8 | |
6 | must have [be] [vb pp] by [det] | 5 |