According to some experts the spoken language uses few subordinate clauses.

That's a phrase, not a clause.

A conjunction is a word which joins words, phrases, clauses and sentences together.

Marriage succeeds only as lifetime commitment with no escape clauses.

The sentence has got too long again." "Then just take out a few of the subordinate clauses."

Please put a comma between the two main clauses.

As soon as the Thanksgiving holiday is over, Santa Clauses start appearing everywhere – in shopping centers, supermarkets and other places.

Chinese American actress Anna Mae Wong wanted to play the female lead in “The Good Earth,” but she did not get the role. “The reason why Anna Mae Wong wasn’t cast was because of this production law that was part of Hollywood. The industry itself put up a production law, and part of the clause was this anti-miscegenation clause that said that you could not have interracial romances on-screen,” said Yuen.

The cause of death was "dependent clauses."

Adverbial time clauses (here 'when') write about the future in the present tense.