a) Read the sentences. What are the tenses in bold? Use the Grammar Reference section to say how they are used. 1 It's very cold in here. I'll turn on the heating. 2 I think…

Sure! Let’s identify the tenses in bold and explain their uses:

1. I'll turn - This is the Future Simple tense. It is used here to express a decision made at the moment of speaking. The speaker has just decided to turn on the heating because it is cold.

2. They'll win - This is also the Future Simple tense. It indicates a belief or prediction about a future event. The speaker thinks that the team will win the match.

3. I won't be - This is the negative form of the Future Simple tense. It expresses a promise about not doing something in the future (i.e., being late).

4. I've got - This is the Present Perfect tense. It is used here to indicate that an action (getting the money) has relevance to the present situation, allowing the speaker to make a decision now.

   I'm going to buy - This is the "be going to" future form. It is used for plans or intentions decided before the moment of speaking, indicating the speaker intends to buy a new digital camera.

5. I'm having - This is the Present Continuous tense. It indicates a planned future arrangement. The speaker has already decided to have lunch with Jane tomorrow.

6. He's going to win - This is another instance of the "be going to" future form. It suggests that there is a strong likelihood or prediction about the outcome of the race based on current evidence (he is in front).

In summary:

• Future Simple is used for spontaneous decisions, predictions, and promises.
• Present Perfect is used for actions relevant to the present.
• "Be going to" is used for intentions and strong predictions.
• Present Continuous is used for planned future arrangements.