One of the easiest ways to make a suggestion in English is to use the expression We could.

• We could go to the park.
• We could ask Ravi.
• We could call the police.
• We could watch a movie, if you like.
• We could go for a walk, if you like.
• We could wait for a little longer.

If you really want to do something, use the expression Let’s …

• Let’s watch a movie.
• Let’s get some rest.
• Let’s buy something to eat.
• Let’s take a cab.
• Let’s try again.
• Let’s wait for another hour.
• Let’s call it a day.

Shall we…? is another expression you can use.

• Shall we invite Madhu?
• Shall we wait for them?
• Shall we complain to the police?
• Shall we call the police?
• Shall we hire a plumber?

If you already have an idea about what you want to do, you can use the expression ‘What about…?’

• What about watching a movie?
• What about going for a walk?
• What about buying a drink?
• What about inviting James to dinner?
• What about making another attempt?
• What about spending the night in a hotel?

Make sure that you are using an ing form after what about…?