1. Although（更书面）= though(更口语) =even if (即使，更偏假设性)=even though（虽然，更偏事实性）+句子
注：不能与but连用。
Devoted though we are to prosperity and freedom, we cannot shake off the judgmental strand of justice.用倒装
2. No matter how/what/who等= 疑问句+ever
No matter who/Whoever you are, you must keep the law.
注意：疑问句+ever 可以引导名词性从句
Whoever（≠ no matter who）comes will be welcome.
3. …, as long as…
You can do what you want, as long as you like.
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