D Underline the correct form of the verb.\(\ne\).g. I booked my holiday ages ago. I am going/will go to Spain. 16 Maybe I'll go am going to bed early tonight. 17 Look at those black clouds! It's probably going to/will rain. 18 I promise I am going to/will feed the cat. 19 | will/am going to order a pizza if you like. 20 I want to buy a new video game so I'll/'m going to save my pocket money.

16. Maybe I'll go to bed early tonight.

We use 'will' for predictions or spontaneous decisions.

17. Look at those black clouds! It's probably going to rain.

We use 'going to' for something that is likely to happen based on present evidence.

18. I promise I am going to feed the cat.

For promises, we usually use 'will'. However, 'going to' can also be used to express a firm intention, especially when it's a planned action.

19. I will order a pizza if you like.

We use 'will' to make an offer or a spontaneous decision.

20. I want to buy a new video game so I'll/'m going to save my pocket money.

We use 'going to' to talk about future plans or intentions.