MANDARIN SENTENCE PATTERN
Topic and comment
Set up what you are talking about, then say something about it.
Topic， + comment
Mandarin often places a known topic at the beginning of a sentence. The comment then says something about that topic.
This is more than a word-order trick: the topic should be understandable from context. Start with short, useful examples.
Examples
这本书，我看过。
This book, I have read.
咖啡，我不喝。
As for coffee, I do not drink it.
今天，我没有时间。
Today, I do not have time.
Keep in mind
Use context to make the topic clear. Arbitrarily moving words can change emphasis or make a sentence unnatural.