| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] have fallen behind | 13 |
|
| 2 | [noun sg] have fallen behind | 7 |
|
| 3 | [noun pl] have fallen behind | 6 |
|
| 4 | have fallen [adv] behind | 6 |
|
| 5 | have fallen behind [adj] | 6 |
|
