No | Pattern | Freq | Relations |
---|---|---|---|
1 | must have been [verb] [adv] [prep] | 56 | |
2 | [vb mod] have been [v-ing] [adv] [prep] | 43 | |
3 | [modal v] have been [v-ing] [adv] [prep] | 43 | |
4 | must have been [v-ing] [adv] [prep] | 15 | |
5 | must [verb] been [v-ing] [adv] [prep] | 15 | |
6 | must have be [v-ing] [adv] [prep] | 15 | |
7 | must have [be] [v-ing] [adv] [prep] | 15 | |
8 | must have [been] [v-ing] [adv] [prep] | 15 |