In English there are eight main parts of speech: noun, verb, adjective, adverb, pronoun, preposition, conjunction and finally interjection.

The main thing that dreams lack is consistency.

The main duty of a priest is to preach in church.

Rice is the chief crop in this area.

He explained the main purpose of the plan.

His main object in life was to become rich.

His main interest is in history.

Japan is an island country, and it consists of four main islands.

Japan consists of four main islands.

Japan plays a key role in the world economy.

The principal cause of death in refugee camps is the lack of nourishment.

Reading is his chief amusement.

Mail order is the main form of direct marketing.

In many countries, the main reason that people come to big cities is because of work.

Any politician who does not toe the main party line would be branded a renegade.

Politics was the main topic of their conversation.

Money is the key factor when we decide to buy a new house.

Flour is the main ingredient in cakes.

All major credit cards are accepted.

We accept all major credit cards.