| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [verb] each year | 35 |
|
| 2 | is [verb] each year | 35 |
|
| 3 | [is] [vb pp] each year | 30 |
|
| 4 | [is] [v-ing] each year | 5 |
|
