| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [adj] for [v-ing] | 654 |
|
| 2 | [is] [adj] for [v-ing] | 638 |
|
| 3 | [be] useful for [v-ing] | 99 |
|
| 4 | [is] useful [prep] [v-ing] | 72 |
|
| 5 | [is] useful [prep] [v-ing] | 72 |
|
| 6 | [is] useful for [v-ing] | 40 |
|
| 7 | [is] useful for [verb] | 40 |
|
| 8 | [is] useful for [v-ing] | 40 |
|
