Do and make: differences

 Do and make 

Do is sometimes confused with make. 

Make is used to talk about building or creating. 

• Let's make a cake. • I once made a toy train. 

Do is sometimes used instead of make. 

This is common when we want to sound casual about a creative activity.

• 'What shall we eat?' 

'Well, let me do an omelette.' (More casual than ‘Let me make an omelette.’) 

Common fixed expressions with do and make

 Both do and make are used in some common fixed expressions. 

Do good, harm, business, one's best, a favor, sport, exercise, one's hair, one's teeth, one's duty, 50mph etc. 

Make a journey, an offer, arrangements, a suggestion, a decision, an attempt, an effort, an excuse, an exception, a mistake, a noise, a phone call, money, a profit, a fortune, love, peace, war, a bed, a fire, progress etc.