| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [v-ing] for | 1268 |
|
| 2 | is [v-ing] [n mass] | 243 |
|
| 3 | [v-ing] [n mass] for | 210 |
|
| 4 | is [n mass] for | 73 |
|
