| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [v-ing] [prep] | 71147 |
|
| 2 | [v-ing] [prep] year | 140 |
|
| 3 | [be] [prep] year | 60 |
|
| 4 | [be] [v-ing] year | 7 |
|
