I speak English, rare, or when it is necessary, for example, has foreign patients come to treatment, it is my duty. You are the first person I want to speak English.
I speak very little English when needed, or that such a treatment to foreign patients. Everyone will give is my mission. You are the first person I wanted to speak English.
I can speak English very little time or when necessary, such as a foreign patients to examine treatment. Everyone to be my duty. You are the first person I want to talk in English.