Ich gehe heute ins Kino.
English: I am going to the cinema today.
Word order in German main (Hauptsätze) and subordinate clauses (Nebensätze) is an important grammar rule. It tells you where to put the verb and other parts of the sentence.
Use main clause word order for independent sentences and direct statements. Use subordinate clause word order when you use words like 'weil', 'dass', 'wenn', which connect two ideas.
Ich gehe heute ins Kino.
English: I am going to the cinema today.
Er sagt, dass er keine Zeit hat.
English: He says that he has no time.
Wenn es regnet, bleibe ich zu Hause.
English: If it rains, I stay at home.
Sie kann nicht kommen, weil sie krank ist.
English: She can't come because she is sick.