shuìjiào qián bié wàngjì bǎ chuānglián lāshàng.

睡觉前 means before sleeping / before going to bed.

Chinese often puts time expressions near the beginning of the sentence, before the main action. So:

• 睡觉前 = before sleeping
• 别忘记把窗帘拉上 = don’t forget to close/draw the curtains

This is a very common pattern:

• 吃饭前洗手。 = Wash your hands before eating.
• 出门前检查一下。 = Check before going out.

So 睡觉前 sets the time frame for the whole sentence.

前 means before when it comes after a verb or phrase.

Pattern:

• verb / action + 前 = before doing that action

Examples:

• 睡觉前 = before sleeping
• 吃饭前 = before eating
• 回家前 = before going home

So 睡觉前 is literally sleep + before, which English expresses as before sleeping or before bed.

Yes. 睡觉之前 is also correct.

Both mean before sleeping, but there is a small difference in feel:

• 睡觉前 = shorter, very common in everyday speech
• 睡觉之前 = a little fuller or slightly more formal

In this sentence, 睡觉前别忘记把窗帘拉上 sounds very natural and concise.

别 is used to tell someone don’t... or don’t do...

So:

• 别忘记 = don’t forget

This is one of the most common ways to make a negative command in spoken Chinese.

Examples:

• 别说话。 = Don’t talk.
• 别担心。 = Don’t worry.
• 别忘记关门。 = Don’t forget to close the door.

So here, 别 is giving a gentle instruction or reminder.

This is a very common learner question.

• 不 usually means not for statements
• 别 usually means don’t for commands or requests

Compare:

• 我不忘记。 = I do not forget.
  This sounds unusual in most situations.
• 别忘记。 = Don’t forget.

So in this sentence, 别 is correct because the speaker is telling someone what not to do.

把 is used to bring the object forward and show what is being affected by the action.

Structure:

• 把 + object + verb + result/complement

Here:

• 把窗帘拉上
• literally: take the curtains and pull them shut

Without going too deeply, the 把 construction is common when:

1. the object is specific
2. the action changes or affects it
3. the result matters

In this sentence, the curtains are a specific thing, and the speaker cares about the result: they should end up closed/drawn.

Yes, but the wording would usually change.

For example:

• 睡觉前别忘记拉上窗帘。

This is also natural.

Both are good:

• 别忘记把窗帘拉上
• 别忘记拉上窗帘

The version with 把 puts extra focus on 窗帘 as the thing being dealt with. It can sound slightly more explicit about handling that object.

拉 means to pull.

But 拉上 means pull closed / pull shut / draw closed.

The 上 here is a result complement. It often shows that an action reaches a particular result or state. In this case, the curtains end up closed.

So:

• 拉窗帘 = pull the curtains
• 拉上窗帘 = pull the curtains closed

This is why 上 is important here: it shows the completed result, not just the action of pulling.

Not exactly.

Although 上 often means up or on, in many verb compounds it has a more abstract function. Here it does not literally mean up. Instead, it helps indicate a result: the curtains become closed.

You will often see 上 in similar patterns:

• 关上门 = close the door
• 锁上门 = lock the door
• 穿上衣服 = put on clothes

So in 拉上窗帘, 上 helps express that the curtains are pulled into the proper final position.

Because in Chinese, curtains are commonly described as something you pull.

So:

• 拉开窗帘 = pull the curtains open
• 拉上窗帘 = pull the curtains closed

This is very natural in Mandarin. English also sometimes says draw the curtains, which is quite similar in idea.

You would not normally use a verb like 关 by itself with 窗帘 the way you do with 门 or 窗. For curtains, 拉 is the usual verb.

Yes, the subject is omitted, and that is very common in Chinese.

The sentence is understood as something like:

• 你睡觉前别忘记把窗帘拉上。
• Before going to bed, don’t forget to draw the curtains.

Chinese often leaves out the subject when it is obvious from context. In reminders, instructions, and conversation, this happens all the time.

Chinese does not have articles like a, an, and the.

So 窗帘 can mean:

• curtain
• curtains
• the curtain
• the curtains

The exact meaning comes from context.

In this sentence, 窗帘 is understood naturally as the curtains or your curtains, depending on the situation.

It could be either in pure grammar, because Chinese nouns usually do not change form for singular vs. plural.

So 窗帘 may mean:

• curtain
• curtains

In real life, the meaning is decided by context. Since windows often have a pair or set of curtains, English will often translate it as the curtains, but Chinese does not need a plural ending.

In Chinese, 忘记 can be followed directly by a verb phrase meaning forget to do something.

Pattern:

• 忘记 + verb phrase = forget to do something

Examples:

• 忘记带钥匙 = forgot to bring the keys
• 忘记关灯 = forgot to turn off the light
• 别忘记把窗帘拉上 = don’t forget to draw the curtains

So there is no need for a word like to between 忘记 and the next action.

Yes, 不要忘记 is grammatical and means the same thing.

But there is a difference in style:

• 别忘记 = shorter, more conversational, very common
• 不要忘记 = a little fuller, sometimes slightly more formal or emphatic

In everyday reminders, 别忘记 sounds very natural.

Some changes are possible, but not every change sounds equally natural.

Very natural:

• 睡觉前别忘记把窗帘拉上。
• 睡觉前别忘记拉上窗帘。

Also possible:

• 别忘记睡觉前把窗帘拉上。

But putting 睡觉前 at the beginning is especially common because Chinese likes to set the time first, then give the instruction. That is why the original sentence sounds smooth and natural.