No | Pattern | Freq | Relations |
---|---|---|---|
1 | must have [been] [adv] [prep] | 23 | |
2 | must [vb infin] [been] [adv] [prep] | 23 | |
3 | must [verb] been [adv] [prep] | 23 | |
4 | must have [been] [adv] [prep] | 23 | |
5 | must [verb] [been] there [prep] | 6 | |
6 | must [verb] [been] [adv] for | 6 |