Japanese Sentences with English Translations - Sentences [わからなければ]

My older sister gave me an iPhone, but I don't know how to use it.

I don't know. Why don't you ask Tom?

"How did you know that I like Tom?" "You can tell just by looking."

As for the criminal, I also currently have no idea how to interpret his actions.

Do you know how to use this machine?

Do you know who this belongs to?

Do you know whose this is?

Do you know whose handwriting this is?

Do you know what this means?

Can you understand the meaning of this paragraph?

Tom doesn't know the difference between wine and champagne.

Can someone tell me why Tom is angry?

Could someone tell me why Tom is angry?

I know what we can do.

He could not see well in the dark, but from the sound of her voice he could tell that the girl was on the verge of tears.

Tom didn't know what to say.

I don't know where I should go.

If you eat with someone you like, everything is delicious, if you eat with someone you don't like, everything is nasty. If you eat alone, you can't taste anything at all.

I know that things will get hairy if I don't start studying for my exams soon, but I just don't have any motivation.

I can see you're frightened.