No | Pattern | Freq | Relations |
---|---|---|---|
1 | must [verb] be [v-ing] [prep] | 81 | |
2 | must [verb] be [v-ing] [prep] | 81 | |
3 | [modal v] [verb] be [v-ing] to | 39 | |
4 | must [verb] be [verb] to | 33 | |
5 | must [verb] [be] [v-ing] to | 10 | |
6 | must [verb] be [v-ing] to | 10 |
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