Ex 1. Complete the sentences with have to or has to: 1. I _______ learn Spanish. 2. We _______ go to work by bus. 3. Susan _______ call her clients every day. 4. They _______ get up early to catch the train. 5. He _______ learn German.

Okay, let's fill in the blanks with the correct form of 'have to' or 'has to'. Remember, 'has to' is used with third-person singular subjects (he, she, it), while 'have to' is used with all other subjects (I, you, we, they). 1. I *have to* learn Spanish. 2. We *have to* go to work by bus. 3. Susan *has to* call her clients every day. 4. They *have to* get up early to catch the train. 5. He *has to* learn German. **Explanation:** * 'I', 'we', 'they' take 'have to'. * 'Susan' and 'He' take 'has to'.