No | Pattern | Freq | Relations |
---|---|---|---|
1 | [pron] [be] essential for [v-ing] | 9 | |
2 | [pron] be essential for [verb] | 9 | |
3 | [pron] [be] essential for [verb] | 9 | |
4 | which [be] essential for [verb] | 7 | |
5 | [Wh det] [be] essential for [verb] | 7 | |
6 | which [be] essential for [verb] | 7 |