Thợ máy kiểm tra định kỳ, rồi bơm lốp.

Thợ máy means mechanic. In Vietnamese, nouns usually do not need articles like a, an, or the.

So:

• thợ máy = mechanic / the mechanic / a mechanic

Which one is intended depends on context. In a standalone sentence like this, English often translates it as the mechanic if a specific mechanic is already understood, or just a mechanic in a more general context.

Also, thợ often means a skilled worker or tradesperson, and máy means machine, so thợ máy is literally something like machine worker, i.e. mechanic.

In this sentence, kiểm tra is the verb phrase check / inspect, and định kỳ means periodically / routinely / on a regular schedule.

So:

• kiểm tra = check, inspect
• định kỳ = periodically, routine, scheduled

Vietnamese often puts this kind of adverbial information after the verb:

• kiểm tra định kỳ = inspect periodically / do routine checks

Even though English may use a noun phrase like a routine inspection or periodic maintenance check, Vietnamese here is structured more like a verb plus a modifier.

Here it is best understood as a verb phrase:

• kiểm tra = to inspect / to check
• định kỳ = periodically / routinely

So the sentence is describing actions:

1. the mechanic does routine checks
2. then inflates the tires

In other contexts, kiểm tra định kỳ can also function more like routine inspection as a noun-like expression, depending on the sentence. But here, because it is followed by another action with rồi, it clearly works as an action.

Good question. Rồi has more than one use in Vietnamese.

In this sentence, rồi means something like:

• then
• and then
• after that

So:

• kiểm tra định kỳ, rồi bơm lốp = checks routinely, then pumps/inflates the tires

But rồi can also mean already in other sentences, especially after a verb:

• Tôi ăn rồi. = I already ate. / I’ve eaten.

So you have to read it from context.

Here, because it connects two actions, rồi is a sequencing word, not an already marker.

Vietnamese often omits a repeated subject when it is obvious from context.

So instead of saying:

• Thợ máy kiểm tra định kỳ, rồi thợ máy bơm lốp.

Vietnamese naturally says:

• Thợ máy kiểm tra định kỳ, rồi bơm lốp.

The subject of bơm lốp is still understood to be thợ máy.

English can do something similar:

• The mechanic does a routine check, then inflates the tires.

We do not need to repeat the mechanic there either.

Yes. Bơm means to pump or to inflate, and lốp means tire.

So:

• bơm lốp = pump the tire / inflate the tire
• depending on context, it can also mean inflate the tires

In natural English, inflate the tires is often the smoothest translation, but pump up the tires is also fine.

Vietnamese often uses very compact verb-object expressions like this.

Vietnamese nouns usually do not change form for singular vs. plural.

So lốp can mean:

• tire
• tires

Context tells you which is meant.

In a sentence about a mechanic servicing a vehicle, English will often naturally use the plural:

• inflate the tires

But Vietnamese does not need a special ending like -s.

If the speaker wants to be more explicit, they can add words for number or plurality, but it is often unnecessary.

Not always. The comma here helps show a pause between two sequential actions:

• Thợ máy kiểm tra định kỳ, rồi bơm lốp.

Without the comma, the sentence would still usually be understandable:

• Thợ máy kiểm tra định kỳ rồi bơm lốp.

However, punctuation can affect how easily the sentence is read. The comma makes the sequence clearer and sounds a bit more natural in writing when two actions are being linked.

Vietnamese usually does not mark tense directly on the verb the way English does.

So:

• kiểm tra
• bơm

do not change form for present, past, or future.

The time is understood from context. This sentence could describe:

• a habitual action: The mechanic routinely checks, then inflates the tires
• a present description: The mechanic is doing a routine check, then inflating the tires
• a past event, if the context is past
• a future plan, if the context is future

If Vietnamese needs to be more specific, it can add time words or markers, but none are required here.

Yes. Định kỳ can be translated in several close ways, depending on the context:

• periodically
• regularly
• on a scheduled basis
• routine

So kiểm tra định kỳ might be rendered as:

• inspect regularly
• carry out routine checks
• perform periodic inspections

All of these capture the same basic idea.

No. Rồi is very common and natural, but Vietnamese has other ways to link actions depending on style and nuance.

For example, speakers may also use words like:

• sau đó = after that
• rồi sau đó = and then after that

But rồi is simple, common, and very natural in everyday Vietnamese.

In this sentence, rồi is probably the most straightforward choice.

Yes. Because Vietnamese does not mark tense clearly here, the sentence can sound like either:

• a description of what the mechanic usually does
• a step in a maintenance procedure
• a narration of one event, if context supports that

So it could fit contexts like:

• describing a mechanic’s usual work
• explaining vehicle maintenance steps
• narrating what happened during servicing

That flexibility is very common in Vietnamese.

A simple way to break it down is:

• Thợ máy = subject
• kiểm tra định kỳ = first action
• rồi = then
• bơm lốp = second action

So the pattern is:

subject + action 1 + then + action 2

That is a very common Vietnamese sentence pattern, especially when one subject does two actions in sequence.