| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [be] [v-ing] [prep] year | 20 |
|
| 2 | [be] [v-ing] [prep] two year | 15 |
|
| 3 | [vb past] [be] [v-ing] [prep] two | 9 |
|
