| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be backed [adv prt] by [art] | 10 |
|
| 2 | [be] backed up by [art] | 10 |
|
| 3 | [be] backed [adv prt] by [art] | 10 |
|
| 4 | [be] backed [adv prt] by a | 9 |
|
| 5 | [be] backed [adv prt] by a | 8 |
|
