| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a useful way [prep] [v-ing] [noun] | 20 |
|
| 2 | a useful way of [v-ing] [noun] | 20 |
|
| 3 | a useful way [prep] [v-ing] [noun sg] | 12 |
|
| 4 | a useful way [prep] [v-ing] [noun pl] | 8 |
|
