explain
The German word 'erklären' is a verb that is used to express the action of explaining something. It can be used in various contexts, such as explaining a concept, a situation, or a problem. For example, one might say 'Ich kann es nicht erklären' (I can't explain it) when they are unable to provide a clear explanation for something.
Could you please explain that?
This is a polite request in which the speaker is asking someone else to explain something. The usage of 'Sie' implies that the speaker is addressing someone in a formal manner.
I can't explain it.
This phrase is used when the speaker cannot explain something due to lack of understanding or because it is too complicated. It implies that the subject is beyond the speaker's comprehension or ability to elucidate.
He will explain it to us later.
This phrase is used when the speaker is expecting someone else (in this case, 'He') to explain something at a later time. It suggests that the speaker and the audience (us) are waiting for an explanation.