Would you like to go? - 갈래요?

Would you like to go? - 갈래요?

~을(ㄹ)래요? is used when you express your desire to do something together with someone, or when you want someone to do something. So it is similar to "Would you like to do something?/Do you want to do something?" in English. 

● Rule 

1. For verbs without a final consonant, add ㄹ 래요.

• 하다 = 할래요? = Would you like to do?
  
• 가다 = 갈래요? = Would you like to go?
• 사다 = 살래요? = Would you like to buy?
• 마시다 = 마실래요? = Would you like to drink?

2. For verbs with a final consonant, add 을래요.

• 먹다 = 먹을래요? = Would you like to eat?
• 앉다 = 앉을래요? = Would you like to sit?
• 읽다 = 읽을래요? = Would you like to read?
  

Eg.

커피 마실래요? = Would you like to drink coffee?
점심 먹을래요? = Would you like to eat lunch?
극장에 같이 갈래요? = Would like to go to the cinema together?

극장 = cinema, theatre
점심 = lunch, noon
같이 = together

Note: If you omit 요 off 을(ㄹ)래요, ie. 을(ㄹ)래 it becomes an informal form.

커피 마실래? = Would you like to drink coffee?
점심 먹을래? = Would you like to eat lunch?
극장에 같이 갈래? = Would like to go to the cinema together?