1.只有当你找到合适的学习方法时,你才能学好这门课.(only在句首)
Only when you find proper ways of learning, will you be able to learn this subject well.
2.一旦你学了西班牙语,你就会觉得意大利语很容易了.(once)
Once you have learnt Spanish, you will find the Italian language very easy.
3.这是我第一次听他唱歌.(It is the first time that ...)
It is the first time that I've heard him sing.
4.他第一次到这个城市的时候,除了他叔叔之外他不认识任何人.(the first time...)
He knew nobody else but his uncle the first time he came to this city.
5.他直到上高二的时候才有了学习的动力.(not ... until ...)
He didn't have the motivation to study until he was a Senior 2 student. 原创回答团(159号会员)