No | Pattern | Freq | Relations |
---|---|---|---|
1 | must have be [v-ing] [prep] | 81 | |
2 | must have be [v-ing] [prep] | 81 | |
3 | [modal v] have be [v-ing] to | 38 | |
4 | must have be [verb] to | 33 | |
5 | must have [be] [v-ing] to | 10 | |
6 | must have be [v-ing] to | 10 | |
7 | must [verb] be [v-ing] to | 10 |