giup e voi

Here are the rewritten versions: 1. Going by train will be cheaper. (Or: Taking the train will be cheaper.) 2. Unless Lan hurries, she will be late. (Or: If Lan doesn't hurry, she will be late.) 3. If it rains, we will stay at home. (Or: In the event of rain, we will stay at home.) 4. If I had a map, I would lend it to you. (This sentence is already in the correct form, but a more idiomatic way to express this idea would be: I'd lend you my map if I had one.) 5. If you had told me, I could have helped you. (This sentence is already in the correct form, but a more idiomatic way to express this idea would be: I could have helped you if you had told me.)