No | Pattern | Freq | Relations |
---|---|---|---|
1 | [be] essential for [v-ing] | 39 | |
2 | be essential for [verb] | 39 | |
3 | [is] essential for [verb] | 20 | |
4 | is essential for [verb] | 20 | |
5 | are essential for [verb] | 11 | |
6 | [am/are] essential for [verb] | 11 | |
7 | [was/were] essential for [verb] | 7 |