Present Continuous (I am doing/He is doing)现在进行时
● The form for the Present Continuous is am/is/are doing.
● 现在进行时结构：am/is/are doing
★ The students are preparing for the entrance exam at present.
★ 眼下学生们正在准备入学考试。
● For negative sentences, we insert NOT between the auxiliary verb and the main verb.
● 否定句，助动词和主动词之间加NOT。
★ I am not watching football matches.
★ 我现在没在看足球比赛。
● For question sentences, we exchange the subject and the auxiliary verb.
● 疑问句，主语和助动词调换位置。
★ Is he doing his homework？
★ 他正在做作业吗？
● We use the Present Continuous to talk about particular actions or events that have begun but have not ended at the time of speaking. We often use time expressions such as at the moment, at present, currently, just, and still to emphasize that the action or event is happening now.
● 现在进行时表达在说话时已经开始但是还未结束的活动或事件。我们通常加at the moment、at present、currently、just、still等表示时间的词来强调某活动或事件正在发生。
★ The shop is so inefficient that many customers are shopping elsewhere.
★ 这家店的效率太低了，以至于许多顾客去别处购物了。
★ Cathy is learning to drive.
★ 凯西正在学开车。
★ Who are you phoning? I’m trying to get through to Andy.
★ 你在给谁打电话？我正设法联系安迪。
★ She is only just recovering from the operation and is still finding it difficult to move about. At the moment she is spending most of her time in bed.
★ 她刚刚从手术中恢复过来，但仍然感觉行动不便。目前，她大部分时间都在床上度过。
★ The airline is currently selling half-price tickets to Japan, but for one month only.
★ 该航空公司目前正半价销售前往日本的机票，但半价销售只限一个月。
● We use the Present Continuous or the Present Simple to describe something that we regularly do at a particular time, but the meaning is different.
● 现在进行时和一般现在时均可用来描述在某一特定的时间经常做事情，但表达的意思有所不同。
★ We usually watch the news at 9PM. (=We start watching at 9:00.)
★ 我们通常晚上九点开始看新闻。（9点开始看）
★ We’re usually watching the news at 9:00. (=We are already watching at 9PM.)
★ 晚上九点的时候我们通常正在看新闻。 (9点已经在看)
● We use the Present Continuous to imply that a situation that has begun is or may be temporary. Compare:
● 现在进行时可用来表示在过去开始的某项临时活动，试比较：
★ Banks lend money to make a profit. (this is what usually happens)
★ 银行借贷是为了盈利。(常规做法)
★ Banks are lending more money to encourage businesses to expand. (implies a temporary situation)
★ 银行借出更多的钱以鼓励企业扩张。(一种暂时的策略)
● We often prefer to use the Present Simple with stative verbs. However, we can use the Present Continuous with some stative verbs when we want to emphasize that a situation is temporary for a period of time around the present, such as ache, feel, hurt, look, be, etc.
● 静态动词，通常使用一般现在时，但有些静态动词也可用现在进行时来强调某种情况只是暂时的，如ache, feel, hurt, look, be等等。
★ How are you feeling today?
★ 你今天感觉如何？
★ I’m feeling a little tired today.
★ 我今天感觉有点累。
★ What’s the matter with Andy? He is looking awful.
★ 安迪怎么了？他看起来很糟糕。
★ Cathy is ill but won’t see a doctor. She is being foolish.
★ 凯西生病了，但不去看医生。她正在犯傻做蠢事。
★ Don’t talk rot. I’m being serious.
★ 别胡说，我是认真的。
★ You’re being very clever today.
★ 你今天真聪明。
● We use the Present Continuous when we talk about changes, developments and trends.
● 当谈论变化、发展、或趋势时，用现在进行时。
★ The growing number of visitors is damaging the environment here.
★ 不断增多的游客正在破坏这里的环境。
★ I’m beginning to realize how difficult it is to be a teacher.
★ 我开始意识到教书并非一件易事。
When we want to emphasize that something is done repeatedly, we can use the Present Continuous with frequency words like always, constantly, continually, forever. Often, we do this when we want to show a feeling of dissatisfaction or complaints.
现在进行时同频率副词，如always, constantly, continually, forever连用时，强调某事经常发生，通常用来表示不满或抱怨情绪。
★ They are constantly having parties until the early hours of the morning.
★ 他们经常开派对直到凌晨。
★ My wife is forever criticizing me.
★ 我的妻子总是批评我。
★ I'm continually forgetting people's name.
★ 我总是忘记别人的名字。
● We normally make the Present Continuous by adding ING to the base verb.
● 通常情况下，直接在动词原形后 ING。
☆ work – working
☆ play – playing
☆ assist – assisting
☆ be – being
● If the base verb ends in vowel consonant e, omit the E.
● 动词以元 辅 e（VCe）结尾，去掉E，再 ING。
☆ come – coming
☆ mistake - mistaking
● If the base verb ends in consonant stressed vowel consonant, double the last letter. If a verb ends in W or X, do not double the consonant.
● 当动词以辅元辅结尾且重音在最后一个音节，双写最后一个辅音字母，再 ING。如单词以W或X结尾，直接 ING。
☆ stop – stopping
☆ run – running
☆ chat – chatting
☆ rob – robbing
☆ begin – beginning
☆ regret – regretting
☆ prefer – preferring
☆ show – showing
☆ fix – fixing
Note that this exception does not apply when the last syllable of the base verb is not stressed.
注：如果重音不是在最后一个音节，则直接 ING。
☆ open – opening
☆ happen – happening
☆ offer – offering
☆ listen – listening
● If the base verb ends in IE, change the IE to Y and then add ING.
● 当动词以IE结尾，变IE为Y，再加ING。
☆ lie – lying
☆ die – dying
☆ tie – tying
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