力を貸してって英語でなんて言うの？

Both of these examples will let someone know you need help and that you are asking them for a helping hand.

When asking for help, it's important to be polite. So in most situations, it would be appropriate to simply say: -Could you please give me a hand (with this)? -Could you help me? -Would you please help me (with this box)?

When making a polite request you can use the expressions: "Would you mind...?", "Could you...", or "Can you... please?" Please can always be added at the beginning or the end of a request to make it more polite.

Could you or would you are both nice polite ways of asking someone to do something for you they are both asking if someone can (could) or will (would) do something Its always a nice idea to add please as it makes it a more polite way of asking

The two sentences you see above are terrific ways to ask someone for help. In the first sentence you will see the term help someone out and in the second sentence you will see the term lend a hand. Both of these terms mean to help and are common in our everyday conversation. Both of these terms would make a great addition to your vocabulary.

The easiest and most common way to ask for help is to simply say: Help me with this please. You can ask in a polite way by saying: Can you please help me?, Can you give me a hand? Can you give me a little assistance? The expression "lend a hand" is a little more formal. It is very important that you remember to say give me a hand and not give me your hand. It changes the meaning of the expression.