| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | if he had [be] [v-ing] [prep] | 12 |
|
| 2 | if he had [been] [v-ing] [prep] | 12 |
|
| 3 | if he had been [v-ing] [prep] | 12 |
|
| 4 | if he had be [v-ing] [prep] | 12 |
|
