How to state "to be on time" and "to have no time"
The verbs 来得及 
and 来不及 can be used both independently and with a verb placed after them.
and 来不及 can be used both independently and with a verb placed after them.
Pay attention
来不及 is often used with the particle 了 at the end of a sentence.
at the end of a sentence.Examples
不用着急，我们来得及
Don't worry, we have time
búyòng zhāojí, wǒmen láidejí
我们还来得及去吃饭
We still have time to eat
wǒmen hái láidejí qù chīfàn
我起得很晚，来不及准备行李箱了
I got up too late so I had no time to pack my suitcase.
wǒ qǐ de hěn wǎn, láibují zhǔnbèi xínglǐxiāng le
The negative adverbs 没 and 没有 can be placed before 来得及 to express "had no time".
and 没有 can be placed before 来得及 to express "had no time". Pay attention
The difference between 来不及 and 没来得及 is that 来不及 can be used not only in the past tense, but also in the present and future tenses.
Examples
我还没来得及解释跟她, 她就跑了
She ran away before I could explain it to her
wǒ hái méi láidejí jiěshì gēn tā, tā jiù pǎo le
她没来得及坐那趟公交
She missed that bus
tā méi láidejí zuò nà tàng gōngjiāo