| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | i [vb base] once [verb] [art] | 7 |
|
| 2 | i [vb base] once [v-ing] [art] | 6 |
|
| 3 | i [vb base] once [art] [noun] | 6 |
|
| 4 | i [vb base] once [art] [noun sg] | 6 |
|
