| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] a [det] years ago | 121 |
|
| 2 | [noun prp] a [det] [noun pl] ago | 71 |
|
| 3 | [noun prp] a [det] [noun] ago | 71 |
|
| 4 | [noun prp] a [det] years [adv] | 58 |
|
| 5 | [noun prp] a [adj] years ago | 30 |
|
| 6 | [noun prp] a [det] year ago | 29 |
|
| 7 | [noun prp] [art] [det] years ago | 29 |
|
