By using but, yet, whereas and nevertheless
These conjunctions are used when two contrasting statements have to be joined together.

• He is poor. He is honest.
• He is poor but he is honest.
• She is ill. She is cheerful.
• She is ill, yet cheerful.
• Tom is diligent. His brother is lazy.
• Tom is diligent whereas his brother is lazy.

By using or, either…or, neither…nor, otherwise, else

These conjunctions are used when we have to present two alternatives.

• You can have tea. You can have coffee.
• You can have tea or coffee.

• He does not smoke. He does not drink.
• He neither smokes nor drinks.

By using for and so

These conjunctions are used when you have to make an inference from another statement or fact.

• They must have gone out. Nobody is answering the phone.
• They must have gone out for nobody is answering the phone.

Related posts:

1. Simple and Compound sentences