No | Pattern | Freq | Relations |
---|---|---|---|
1 | [is] useful [prep] [v-ing] | 72 | |
2 | [is] useful [prep] [v-ing] | 72 | |
3 | is useful [prep] [v-ing] | 70 | |
4 | [is] useful for [v-ing] | 40 | |
5 | [is] useful for [v-ing] | 40 | |
6 | [is] useful in [v-ing] | 32 | |
7 | [is] useful in [v-ing] | 32 |