| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [v-ing] [prep] | 15735 |
|
| 2 | [v-ing] [prep] time | 254 |
|
| 3 | [is] [v-ing] time | 32 |
|
| 4 | [is] [prep] time | 21 |
|
