Choose the correct verb forms.
1 I will have lost / will be losing 2 kg by the end of the month.
2 Come for lunch tomorrow. We ’ll be having / ’ll have had pizza.
3 Will you be finishing / Will you have finished work by six o’clock?
4 Helen will be working / will have worked in the garden at 3 o’clock.
5 We’ll put the house up for sale next week, so hopefully we will be selling / will have sold it by next month.

1. I will have lost 2 kg by the end of the month.
Explanation: In this sentence, we are talking about a future action that will be completed before a specific point in time (the end of the month). Therefore, we use the future perfect tense "will have lost" to indicate that the action of losing weight will be completed by that time.

2. Come for lunch tomorrow. We'll be having pizza.
Explanation: In this sentence, we are talking about a future action that will be in progress at a specific time (lunchtime tomorrow). Therefore, we use the future continuous tense "will be having" to indicate that the action of eating pizza will be in progress at that time.

3. Will you be finishing work by six o’clock?
Explanation: In this sentence, we are asking about a future action that will be in progress at a specific time (six o'clock). Therefore, we use the future continuous tense "will you be finishing" to ask if the action of finishing work will be in progress at that time.

4. Helen will be working in the garden at 3 o’clock.
Explanation: In this sentence, we are stating a future action that will be in progress at a specific time (3 o'clock). Therefore, we use the future continuous tense "will be working" to indicate that the action of working in the garden will be in progress at that time.

5. We’ll put the house up for sale next week, so hopefully we will have sold it by next month.
Explanation: In this sentence, we are expressing a hope or expectation about a future action that will be completed before a specific point in time (next month). Therefore, we use the future perfect tense "will have sold" to indicate that the action of selling the house will be completed by that time.

I hope this explanation helps you understand the correct verb forms in these sentences. If you have any further questions, feel free to ask!