| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] back [adv prt] the [noun] | 14 |
|
| 2 | [v-ing] back up the [noun] | 13 |
|
| 3 | [v-ing] back [adv prt] the [noun sg] | 10 |
|
