Question

I am sleepy.I______(work)all night.

Answer 1

Answer:

I worked all night

HOPE THAT HELPS

Answer 2

Answer:

I am sleepy. I have been working all night.

Explanation:

In the given sentence, the tense that has been used is the present perfect continuous tense. The present perfect continuous tense implies that some action has been done and finished in the recent past. Here the speaker feels sleepy, as he was awake all night working on something.  

Though his work has been finished, yet the attention is mainly on the fact that the speaker feels sleepy. Hence, to show that the effect of his actions falls on the present condition, present perfect continuous tense has been used.