doubtless什么意思、怎么读？单词用法、记忆法、发音音标、反义词辨析、词语翻译、例句造句

doubtless 音标：['dautlis]

a. 无疑的, 确定的ad. 无疑地, 确定地

doubtless是形容词还是副词

doubtless是形容词还是副词

（摘自《第二课堂》）

一、基本规律
大家知道，英语中的后缀-less通常用于构成形容词，其相应的副词则是-lessly。如：
1. aimless—aimlessly
After several hours of aimless searching they were getting low on fuel. 在几个小时漫无目的的搜寻之后，他们快没燃料了。
They wandered aimlessly around the town. 他们在城里无目的地闲逛。
2. careless—carelessly
It was careless of him to leave the door unlocked. 他忘了锁门，真是粗心大意。
She was fined £100 for driving carelessly. 她因开车违章，被罚款100英镑。
3. effortless—effortlessly
I went up the steps i

I shall doubtless see you tomorrow.

我大概明天会见到你。