1. Děi xiān mǎi piào ma? 得先買票嗎? is it necessary to buy tickets ahead of time? 2 or 3 days You: Nǐ zuì hǎo liǎngsāntiān yǐqián mǎi piào. 你最好兩三天以前買票。 It would be best for you to buy your tickets two or three days ahead of time. 2. Děi xiān mǎi piào ma? 得先買票嗎? is it necessary to buy tickets ahead of time? no Bú bì xiān mǎi piào. 不必先買票。 it’s not necessary to buy tickets ahead of time. 3. Děi xiān mǎi piào ma? 得先買票嗎? 2 days Nǐ zuì hǎo liǎngtiān yǐqián mǎi piào 你最好兩天以前買票。 4. Děi xiān huàn qián ma? 得先還錢嗎? 4 or 5 days Nǐ zuì hǎo sìwǔtiān yǐqián huàn qián. 你最好四五天以前還錢。 5. Děi xiān qù kàn gēge ma? 得先去看哥哥嗎? no Bú bì xiān qù kàn gēge. 不必先去看哥哥。 6. Děi xiān kàn zhèiběn shū ma? 得先看這本書嗎? 3 days Nǐ zuì hǎo sāntiān yǐqián kàn zhèiběn shū. 你最好三天以前看這本書。 7. Děi xiān huàn qián ma? 得先還錢嗎? no Bú bì xiān huàn qián. 不必先還錢。