Musíme plít záhon, protože je tam plevel.

Musíme means we must / we have to.

It comes from the verb muset = to have to / must.

Czech usually does not need subject pronouns like já, ty, my, oni unless you want emphasis or contrast, because the verb ending already shows who the subject is.

• musím = I must
• musíš = you must
• musí = he/she/it must
• musíme = we must
• musíte = you (plural/formal) must
• musí = they must

So Musíme plít záhon already clearly means We have to weed the bed.

Plít means to weed or to remove weeds.

So:

• plít záhon = to weed a garden bed / flower bed
• plít zahradu could mean to weed the garden

This verb is specifically about removing weeds, not general gardening.

A useful related noun is:

• plevel = weed / weeds (often collectively)

So the sentence is very natural:
Musíme plít záhon, protože je tam plevel.
= We have to weed the bed, because there are weeds there.

Because záhon is the direct object of plít, so it is in the accusative case.

The noun záhon is masculine inanimate, and in the singular, masculine inanimate nouns often have the same form in nominative and accusative.

So:

• nominative: záhon
• accusative: záhon

That is why you see:

• záhon = bed as the subject
• plít záhon = to weed the bed as the object

If it were a masculine animate noun, the accusative would usually look different.

Záhon means a garden bed, such as a flower bed or vegetable bed.

It does not mean the whole garden. More specifically:

• zahrada = garden
• záhon = a bed/patch within the garden

Depending on context, English could translate záhon as:

• flower bed
• garden bed
• vegetable patch
• sometimes simply bed

Protože means because.

It introduces the reason:

• Musíme plít záhon = We have to weed the bed
• protože je tam plevel = because there are weeds there

A very important punctuation point: in Czech, protože is normally preceded by a comma when it introduces a subordinate clause, just like in this sentence:

Musíme plít záhon, protože je tam plevel.

So the comma here is correct and expected.

This is a very natural question.

In Czech, plevel is often used as a collective or mass noun, much like English weeds used in a general sense. So:

• je tam plevel = there are weeds there / there is weed growth there

Even though English often prefers a plural idea (weeds), Czech commonly uses singular plevel to refer to weed growth in general.

You can also encounter plural forms such as plevele or plevely, but in a basic everyday sentence about a bed being full of weeds, je tam plevel sounds very normal.

So the singular verb je matches the singular noun plevel.

Tam means there.

So:

• je tam plevel = there is weed / there are weeds there

It tells you the location of the weeds: in that place, meaning in the garden bed being discussed.

Czech often uses tam in sentences that English translates with there is / there are.

Compare:

• Je tam pes. = There is a dog there.
• Je tam voda. = There is water there.
• Je tam plevel. = There are weeds there.

Both are possible.

Czech word order is more flexible than English, and the choice often depends on emphasis or information structure.

• Je tam plevel. = neutral, very natural
• Tam je plevel. = puts a bit more emphasis on there

In this sentence, protože je tam plevel sounds like a smooth, neutral explanation:
because there are weeds there.

So the version in the example is a very normal default word order.

Yes, muset / musíme expresses necessity or obligation.

Depending on context, it can mean:

• we must
• we have to
• we need to

In this sentence, the most natural English is probably:

• We have to weed the bed, because there are weeds there.

Using must is also possible, but in everyday English have to often sounds more natural.

So musíme is not just a suggestion; it implies that we need to do it.

Plít is imperfective.

That fits well here because the sentence is about the activity itself:

• Musíme plít záhon = We have to do some weeding / weed the bed

Imperfective verbs are commonly used after verbs like muset when talking about what needs to be done as an activity.

In real usage, Czech speakers may also use other related verbs depending on style and focus, but plít is the straightforward basic verb for to weed.

For a learner, the main thing to remember is:

• plít = the normal verb meaning to weed

They are related in meaning, but they sound different:

• plít = one syllable, with a long í
• plevel = two syllables, roughly PLE-vel

A helpful point:

• í is long in plít
• e sounds shorter and more open in plevel

Also, the meanings are different grammatically:

• plít = verb = to weed
• plevel = noun = weed / weeds

So in the sentence:

• Musíme plít... = We have to weed...
• ...je tam plevel. = ...there are weeds there.

Yes. Vyplít is a related verb and often means to weed out completely or to finish weeding.

Very roughly:

• plít = to weed, the activity itself
• vyplít = to weed out / weed completely

So:

• Musíme plít záhon. = We have to weed the bed.
• Musíme vyplít záhon. = We have to weed the whole bed thoroughly / get it weeded.

In many everyday contexts, both can be used, but the perfective vyplít gives more of a completed-result idea.

Most often in sentences like this, plevel refers to weeds in general as a collective idea.

So:

• Je tam plevel. = There are weeds there.

If you want to talk about individual weeds or kinds of weeds, plural forms may appear, but a learner should recognize that singular plevel very often corresponds to English weeds.

This is one of those places where Czech and English package the idea differently:

• Czech: singular collective noun
• English: often plural count noun

So even though the Czech noun is singular, the English translation may naturally be plural.