| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had thought [prep] | 176 |
|
| 2 | had think of | 126 |
|
| 3 | had think about | 51 |
|
| 4 | had to think [prep] | 36 |
|
| 5 | had think for | 10 |
|
| 6 | had think at | 10 |
|
