| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had be [v-ing] [adv prt] [prep] | 171 |
|
| 2 | be [v-ing] [adv prt] [prep] years | 31 |
|
| 3 | had be [v-ing] [prep] years | 18 |
|
