In Modal verbs^x, Translation^x

Modal verb: I have to study Grammar all the time. Present perfect: I have been in Dalat for twenty years. She has been.. Present perfect continuous: I have been eating She has been eating. Causative: I have my car serviced If -clause; If I have time, I'll go with you If I had time...

Dear users of EnglishForums, I believe I’ve finally understood the English uses of the modal verb “used to”. Would you be so kind to read this summary and comment it? I’ve included my Spanish translation of the English sentences in order to help Spanish students (I wish!) and also to receive your...