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補(bǔ)充：
職稱英語(yǔ)常見動(dòng)詞時(shí)態(tài)與其通常對(duì)應(yīng)的時(shí)間狀語(yǔ)詞
 
 
 
 
一般過去時(shí)態(tài)（walked）
used to do sth.(過去常常...)
e.g. i walked to school last term.
e.g. i used to walk to school last term.
 
yesterday（昨天）, yesterday morning （afternoon/evening /昨天早晨/下午/傍晚）, just now （剛才）, ago （以前） , then（當(dāng)時(shí)） , last + 時(shí)間 （如 last week, month, year, monday/上周/上個(gè)月/去年/上個(gè)星期一 ）, that + 時(shí)間 （如 that day, afternoon /那一天/那個(gè)下午）, 時(shí)間 + ago （如 a few minutes ago, two weeks ago , years ago/幾分鐘以前/兩周以前/幾年以前）
過去進(jìn)行時(shí)態(tài)(was/were + walking)
（時(shí)態(tài)通常意義為“（當(dāng)時(shí)）正在”）
(was/were + v-ing(go，come，drive，fly，travel，arrive，leave，start，set off) 表示按照“意圖”， “安排”在過去某個(gè)時(shí)間看來將發(fā)生的動(dòng)作)
 
at that time意為“在那時(shí)”
表示過去某一具體的時(shí)間，如at eight last night，at six yesterday morning
 
 
過去完成時(shí)態(tài)(had + walked)
（時(shí)態(tài)通常意義為“當(dāng)時(shí)已經(jīng), 曾經(jīng)一直”）
before（以前）, by（到...為止）, until（到...為止） , when（在...的時(shí)候）, after（在...之后）, once（一旦）, as soon as（一...就...）
(在told, said, knew, heard, thought等動(dòng)詞后的賓語(yǔ)從句通常使用過去完成時(shí)態(tài))
 
過去將來時(shí)(would/should/ walk)
 
（時(shí)態(tài)通常意義為“將， 將會(huì)， 將要”）
the next day(morning, year.../接下來的一天/接下來的一個(gè)早晨/接下來的一年),the following month(week.../下個(gè)月/下周…)
 
 
l        非謂語(yǔ)動(dòng)詞結(jié)構(gòu)
 
 
depression and the elderly
1 we all feel sad at times．however，clinical depression is a serious matter．clinical depression，sometimes called major depression，is a biologically based brain disorder that affects one’s thoughts，feelings，behavior，and physical health．when people complain that they feel terrible．they have no interest or take no pleasure ln things，have trouble sleeping．1ack energy，have poor appetite，or cannot concentrate，depression is a definite possibility．
 
1. clinical depression，sometimes called major depression，is a biologically based brain disorder that affects one’s thoughts，feelings，behavior，and physical health.
→→→→
clinical depression，which is sometimes called major depression，is a biologically based brain disorder that affects one’s thoughts，feelings，behavior，and physical health.
 
2. clinical depression，sometimes called major depression，is a biologically based brain disorder that affects one’s thoughts，feelings，behavior，and physical health.
→→→→
clinical depression，sometimes called major depression，is a biologically based brain disorder affecting one’s thoughts，feelings，behavior，and physical health.
 

l         動(dòng)詞不定式:
ⅰ.動(dòng)詞不定式的形式
1．動(dòng)詞不定式是一種非謂語(yǔ)動(dòng)詞，如to have, to work等, 在句中不能單獨(dú)作謂語(yǔ)。不定式符號(hào)“to”不是介詞，無詞義。不定式有一般、完成、進(jìn)行等幾種常用的形式，也有主動(dòng)和被動(dòng)語(yǔ)態(tài)的區(qū)別，職稱英語(yǔ)考題中不定式的被動(dòng)語(yǔ)態(tài)結(jié)構(gòu)是常見的考點(diǎn)， 以study為例：
 
 
主動(dòng)
被動(dòng)
一般式
to study
to be studied
進(jìn)行式
to be studying
 
完成式
to have studied
to have been studied
 
2．不定式結(jié)構(gòu)中的動(dòng)詞仍然保持動(dòng)詞的特征，可帶賓語(yǔ)或狀語(yǔ)，構(gòu)成不定式短語(yǔ)。如：
to do shopping   購(gòu)物
to come back     回來
 
3．不定式的否定形式是在不定式前面加not, never等，如：
they told me not/never to open the window. 他們告訴我不要打開窗戶。
 
4．不定式有時(shí)可直接與疑問詞連用，如what, when, where, which, whom, why, whether, how等，如：
he wanted to know how to handle such a problem. 他想知道怎樣解決這個(gè)問題。
he asked when to leave for home. 他問什么時(shí)候出發(fā)回家。