I Dont Understand；
我不懂;我不了解。
understand；
v.
懂;理解;领会;了解;认识到;明了;谅解;体谅。
第三人称单数： understands现在分词： understanding过去式： understood过去分词： understood。
I don't understand what he's saying.
我不明白他在说些什么。
'I don't understand it,' he said, over and over again.
“我不明白，”他反复不停地说。
I don't understand the instructions.
我不懂这些指令的意思。
I don't understand what you are talking about
我不明白你在说什么。
'I don't understand,' the Inspector mumbled, passing a hand through his hair
“我不明白，”巡官一边嘟囔道，一边用手捋了一下头发。
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