He is given leave to appeal to the higher court against this

題目：

He is given leave to appeal to the higher court against this sentence.中的leave to 是怎麼個用法.
本句中的given後按說應該接名詞形式,可是接用leave搞不清是什麼用法.另外important 有監禁的意思嗎,作爲名詞.如：The judge sentenced him to 3 years'important.

解答：

leave有名詞的用法,permission,agreement,他得到許可向更高一級的法院申請重新審理他的判決 important 只有做形容詞,這個詞應該是imprisonment,監禁,法官判決他入獄三年