英语基础必要知识B

Simple present & Present progressive

1. Simple present

1) permanent, such as general facts or habits

a. general facts & permanent situations

b. routines & habits

time expressions:   always, usually, often, sometimes, never, on Mondays, once a week, two days a week, and twice a month.

c.routines, scheduled events, timetables

2) Special meanings and uses of simple present

a. summarize scientific writing or review artistic works such as books, plays, and movies

b. explain procedures or instructions

    Commonly expressions: first,  then, next, after that, finally

3) Some adverbs with simple present

More common in writing: typically, frequently, traditionally

Common in both speaking and writing: generally, usually, normally

2. Present progressive

1) temporary, such as things in progress now or around now

a. what is progress now or around the present time

b. temporary events or changing situations

2) We often use the present progressive for habits that are noteworthy or unusual.  And you can use always or constantly (more formal) for emphasis.

3) The present progressive form is also common with verbs that describe changing or temporary situations.

Example: The workers at that store are constantly changing. Every week there is someone new. We are always looking for new ideas and people with special talents.

3. Stative verbs

1) non-action or stative verbs

Description: appear, be, exist, look, seem, sound, 

Measurement: cost, weigh

Knowlege: believe, forget, know, remember, think

Emotion: feel, hate, like, love, prefer

Possession/Relation: belong, contain, have, need, own, want

Senses: hear, see, smell, taste

Perception: notice, see, understand

2) verbs with Stative and action meanings

be, have, see, taste, think, and weigh

act, experience, meet with, --,use the mind, --.