Вони копають грядку й прополюють її.

Yes. Ukrainian often drops subject pronouns because the verb ending already shows who is doing the action.

• копають = they dig / they are digging
• прополюють = they weed / they are weeding

So Копають грядку й прополюють її is also possible.

Using вони makes the subject more explicit. It can add:

• clarity
• contrast
• slight emphasis on they

So this sentence is fully natural, but вони is not always required.

Because грядку is the accusative singular form, and it is the direct object of the verb копають.

The dictionary form is:

• грядка = a garden bed / flowerbed / vegetable bed

But after a transitive verb like копати (to dig), Ukrainian uses the accusative:

• грядка → грядку

This is a very common pattern for feminine nouns ending in -а:

• книга → книгу
• машина → машину
• грядка → грядку

Копають is:

• 3rd person plural
• present tense
• from the verb копати (to dig)

So it means:

• they dig
• they are digging

Ukrainian present tense often covers both the English simple present and present continuous. Context tells you which is meant.

Прополюють is also:

• 3rd person plural
• present tense
• from прополювати (to weed)

So it means:

• they weed
• they are weeding

Just like копають, this is an imperfective verb form, so it can describe:

• an ongoing action
• a repeated/habitual action
• a general activity

It does, but Ukrainian often repeats the object with a pronoun when there are two verbs. Here її clearly refers back to грядку.

So the structure is:

• копають грядку = dig the garden bed
• й прополюють її = and weed it

This sounds natural and makes the second verb’s object explicit.

A more compact version is also possible:

• Вони копають і прополюють грядку.

That means essentially the same thing. The version with її just spells the reference out more clearly.

Here її is accusative singular feminine, because it is the direct object of прополюють and it refers to грядку, which is feminine singular.

So:

• грядка is feminine
• її = her / it, depending on context
• in this sentence it means it

Important point: in Ukrainian, її can look the same in more than one case, but here its job in the sentence is clearly accusative because it is the thing being weeded.

Both і and й can mean and.

Ukrainian often switches between them for euphony—in other words, to make the sentence sound smoother.

Here:

• грядку ends in a vowel sound
• прополюють begins with a consonant sound

So й fits very naturally:

• грядку й прополюють її

You may also see і in similar sentences, but й is very common in this kind of position.

Also, й is pronounced like the English y in yes.

It can mean either one, depending on context.

Ukrainian present tense usually does not force the same distinction that English does between:

• they dig
• they are digging

So:

• Вони копають грядку й прополюють її can describe what they are doing right now
• or what they generally / regularly do

If the broader context is about something happening now, English will usually translate it with are digging / are weeding.

Because Ukrainian has no articles like English a / an / the.

So грядку can mean:

• a garden bed
• the garden bed

Context decides which one sounds right in English.

In this sentence, English usually uses the because the object is specific in context:

• They are digging the garden bed and weeding it.

This is a very common adjustment when translating from Ukrainian into English.

Both копають and прополюють are imperfective.

That matters because imperfective verbs are used for:

• ongoing actions
• repeated actions
• processes in progress
• general activities

That is exactly what we want here: the sentence describes the actions as activities underway or as normal actions, not as completed results.

If you used perfective verbs, the meaning would shift toward completion, and in the “present” they would usually have a future meaning in Ukrainian.

So the imperfective forms are the natural choice here.

The word order here is the neutral, straightforward one:

• Вони — subject
• копають / прополюють — verbs
• грядку / її — objects

So this sentence sounds neutral and natural.

But Ukrainian word order is more flexible than English, and you can move things around for emphasis or focus. For example:

• Грядку вони копають й прополюють її
• Вони грядку копають й прополюють її

These are possible in the right context, but they sound more marked. For a learner, the original version is the safest and most natural pattern to use.