首先英語單詞意思重疊的情況時常有
再次單詞詞組要記它的核心意思,
最重要的是要在例句進行區(qū)分
比如說你說的幾個詞組
at a time 例句Eat one apple at a time一次吃一個蘋果 ,這樣就知道 at a time 這“同時,一下子,每次”是指的什么了
at one time 比如說有這樣一句 The kindom was ruled by a king at one time這個國度曾經(jīng)被一個國王統(tǒng)治
at the time I was upset at the time when I heard I failed the exam.
for a time He used to live for a time in the house next to ours.他一度住在我們隔壁的那棟房子里.
for the time being We will have to wait for the time being我們占時只有等