1. Can vs. could.
				              Life's simple pleasures can keep your
          body healthy.
           
          Happy memories can help our bodies fight
          infections.
           Try thinking about happy experiences, this could help you to relax.
          
				  Compare these sentences. Drag the sentences to the correct
				    box. 
				  
	     
				
                  2. Can vs. could.
				  Complete the rules using the words in the box.
				  
	     
				
                  3. Theoretically true vs. possibly true.
				  What do these sentences mean? Choose the correct option.
				  
	     
				
                  4. Can vs. could.
				  Choose the correct option to complete the sentences, to make the second
				    sentence mean the same as the first.