1. I have difficulty in finding a better solution. -> I find......... 2. The dog prevented us from getting nearer. -> We couldn't...... 3. She got lost because she didn't have a map. -> If she .....

`1 . ` `->`  I find it difficult for me to find a better solution.

`-` have difficulty in V-ing : gặp khó khăn trong việc gì

`=` find sth difficult ( for O ) to V-bare : thấy thứ gì khó khăn ( cho ai ) làm gì

`2. ` `->`  We couldn't get nearer because of the dog.

`-` prevent sb from V-ing : ngăn cản ai đó làm gì

`-` couldn't + V-bare : không thể làm gì

`-` because of + N (phr) / Ving : bởi vì ( chỉ nguyên nhân )

`3 .` `->` If she had had a map, she wouldn't have got lost.

`-` Điều kiện loại 3 : If + S + V ( QKHT ) , S + would/could + have + P2

`-` Diễn tả sự việc không có thật ở quá khứ