Jag kontrollerar alltid tidtabellen innan jag går hemifrån.

Because kontrollerar is the present tense form of the verb kontrollera.

• att kontrollera = to check
• jag kontrollerar = I check / I am checking

In Swedish, present tense verbs do not change depending on the subject:

• jag kontrollerar = I check
• du kontrollerar = you check
• han/hon kontrollerar = he/she checks

So kontrollera is the infinitive, while kontrollerar is the form you need here.

In a normal main clause, Swedish usually puts the finite verb in second position. This is often called the V2 rule.

So in:

• Jag kontrollerar alltid tidtabellen

the order is:

• Jag = subject
• kontrollerar = finite verb
• alltid = adverb
• tidtabellen = object

This is very common in Swedish. Compare:

• Jag äter alltid frukost.
• Hon kommer ofta sent.
• Vi brukar aldrig göra så.

English often puts adverbs before the main verb, but Swedish frequently places them after the finite verb in main clauses.

Because tidtabellen is the definite form: the timetable.

• en tidtabell = a timetable
• tidtabellen = the timetable

In Swedish, definiteness is often shown by adding an ending to the noun:

• en bok → boken
• en buss → bussen
• en tidtabell → tidtabellen

So if you mean a specific timetable, Swedish uses the definite ending -en.

Tidtabell usually means a timetable, especially for transport such as buses, trains, or ferries.

It is close to English schedule, but the most natural translation here is usually timetable because it suggests checking departure times.

Related words:

• tidtabell = timetable
• schema = schedule, timetable, class schedule, work schedule depending on context

So in this sentence, tidtabellen most likely refers to a transport timetable.

Because innan jag går hemifrån is a full subordinate clause, and it needs its own subject.

Structure:

• Jag kontrollerar alltid tidtabellen = main clause
• innan jag går hemifrån = subordinate clause

The second clause means before I leave home, and in Swedish you still say the subject explicitly:

• innan jag går
• innan hon går
• innan vi går

Just like in English, the subject is repeated because it belongs to that clause.

Yes, går literally means go / walk, but Swedish often uses gå in expressions where English would say leave.

So:

• gå hemifrån = leave home
• literally: go from home

This is a very natural Swedish expression. It does not necessarily mean that the person is walking. It simply means leaving the house/home.

Hemifrån means from home.

It is built from:

• hem = home
• ifrån = from

Together they are commonly written as one word:

• hemifrån = from home

This is very common in Swedish, where combinations that might be written as two words in English are often written as one word.

Compare:

• hemma = at home
• hem = home / to home
• hemifrån = from home

Because innan introduces a subordinate clause, and subordinate clauses have different word order from main clauses.

In the subordinate clause:

• innan jag går hemifrån

the normal order is:

• conjunction: innan
• subject: jag
• verb: går

You do not use main-clause inversion here.

Compare:

• Jag går hemifrån. = main clause
• innan jag går hemifrån = subordinate clause

So innan går jag hemifrån would be incorrect in this sentence.

Swedish often uses the present tense for actions in the future, especially when the timing is clear from context.

Here, innan jag går hemifrån refers to a future action relative to checking the timetable, but Swedish still uses går.

This is very normal. Compare:

• Jag ringer dig när jag kommer hem.
• Vi äter när hon kommer.

English also sometimes does this:

• I’ll call you when I get home.

So går is completely natural here.

Yes. You can say:

• Innan jag går hemifrån kontrollerar jag alltid tidtabellen.

That is also correct.

But when a sentence starts with something other than the subject, Swedish still keeps the finite verb in second position. So notice the order:

• Innan jag går hemifrån = first element
• kontrollerar = verb in second position
• jag = subject after the verb

You do not say:

• Innan jag går hemifrån jag kontrollerar alltid tidtabellen.

That would be wrong.

It is correct, but in everyday speech many Swedes might more often say kollar.

Compare:

• Jag kontrollerar tidtabellen. = I check the timetable.
  Slightly more formal or careful in tone.
• Jag kollar tidtabellen. = I check the timetable.
  Very common and conversational.

So kontrollerar is good Swedish, but kollar may sound more natural in casual spoken language.

Sometimes, yes, but the original placement is the most neutral one.

Normal version:

• Jag kontrollerar alltid tidtabellen innan jag går hemifrån.

You may also see emphasis in other structures, but beginners should learn this pattern first:

• subject + finite verb + adverb + object

So for now, kontrollerar alltid is the best and safest order to use.

You would usually place inte where alltid is now:

• Jag kontrollerar inte tidtabellen innan jag går hemifrån.

That means I do not check the timetable before I leave home.

This helps show the usual Swedish word order in main clauses:

• Jag kontrollerar alltid tidtabellen.
• Jag kontrollerar inte tidtabellen.

The adverb often comes after the finite verb.