make sure表示尽力做到，深信，务必等含义；可接that从句及其从句的时态，还可接不定式，但不可接动名词。
1.接that从句及其从句的时态。make sure 如果是现在时，或者祈使句形式（原形），that从句的时态应该使用现在时间范畴的时态。
They want to make sure the newcomers don't get a look-in.
他们不想让新人有露脸的机会。
Make sure you join the queue inside the bank.
在银行里一定要排队。
Make sure your pet won't pine while you're away.
要确保不在家时宠物不会想你。
2.make sure除了接从句外，还可以接不定式，但不能接动名词。
Make sure to meet them at the other end.
确保在另一边与他们会合。
Make sure to turn off the light before you leave.
临走前一定要熄灯。
If you saw a traffic accident, make sure to mark down the licence of the car.
如果你看到交通事故，务必记下汽车的牌照号码。
Make sure to give your brother the message about practice tomorrow.
你一定要告诉你弟弟明天练习的事。
