| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] [adv prt] for a | 340 |
|
| 2 | [is] [v-ing] for a | 314 |
|
| 3 | [is] [v-ing] [adv prt] a | 161 |
|
| 4 | [is] [v-ing] [adv prt] for | 130 |
|
| 5 | [is] [adv prt] for a | 46 |
|
