I am studying Japanese.

We are going on a trip together.

He is quite a good cook.

I think his Japanese has improved quite a bit, hasn't it?

I am busy with work during the daytime.

My keys are inside the house.

When he expressed his gratitude, I replied, 'No, thank you.'

Thank you very much, without your help, I wouldn't have been able to complete this project.

Thank you for cooking for me.

Thank you very much, your help was really useful.