一般现在时 (A1)

用 I, you, we, they 的时候，动词用原形，不用加词尾。

I / you / we / they

I work in an office.
You speak English well.
They play football.
Not "They plays football." — say "They play football.". 这里不用加 -s；-s 只有 he、she、it 才用。
试一试: They ___ football. (play / plays) 答案: play — 如果你加了 -s（"plays"），那个词尾只用于 he/she/it。用 they 的时候，动词要保持原形：They play football.

用 he, she, it 的时候，动词要加 -s。

He works in an office.
She lives in Haffenville.
It rains a lot here.
Not "He work in an office." — say "He works in an office.". -s 就是用来告诉你主语是 he、she 还是 it。
试一试: He ___ in an office. (works / work / working) 答案: works — 用 he 的时候，动词要加 -s。你用了原形，记得加词尾：He works.

动词以 s, x, ch 或 sh 结尾时，词尾要加 -es。另外还有两个直接记住就好：go → goes 和 do → does。

She watches movies.
He pushes the door.
She fixes the car.
He goes to work.
试一试: She ___ movies. (watches / watchs / watch) 答案: watches — 你想到要加词尾，方向是对的，只是 ch 后面要用 -es，不是 -s：watches.

看看这个规律：study → studies · try → tries · fly → flies。y 变成 ies。但如果 y 前面是 a, e, i, o, 或 u，就保留 y，直接加 -s 就行：play → plays。

She studies English.
He tries hard.
but: play → plays (an a before the y)
试一试: She ___ English every day. (studies / studys / study) 答案: studies — 很接近了，y 要变化：study → studies（不是 "studys"）。

每个动词前先问一句：主语是谁？ he/she/it → 加 -s。I/you/we/they → 不加词尾。

He plays. / They play.
She works. / We work.
Not "He play. / They plays." — say "He plays. / They play.". 动词一样，是主语决定要不要加词尾。
试一试: My sister ___ tea, but my parents ___ coffee. (drinks … drink / drink … drinks / drinks … drinks) 答案: drinks … drink — My sister = she → drinks（加 -s）。My parents = they → drink（不加词尾）。
试一试: My brother ___ in a bank, but his friends ___ in a shop. (works … work / work … works / works … works) 答案: works … work — My brother = he → works（加 -s）。His friends = they → work（不加词尾）。每一个都由“谁在做”来决定。

现在你可以自己组句了。一般现在时用来说习惯、事实和 日常行为（一直成立的事情，不是此刻正在发生的）。

I drink tea every morning. (routine)
The sun rises in the east. (fact)
We play football on Sundays. (habit)
试一试: One is a habit Amina repeats. One is a fact about the world. Which one is the habit? (Amina walks to work every day. / Haffenville has two parks.) 答案: Amina walks to work every day. — every day 说明她一直在重复，所以是习惯。而“Haffenville has two parks”是事实：它本来就是这样，不是谁一次又一次做的事。一般现在时两种都能表示。