1 - "Don’t talk so loudly!" — "I (not / to talk) loudly".
2 - He (to know) all about the film.
3 - Jane (to talk) to a friend at the moment.
4 - He (not / to work) on Sundays.
5 - Margaret (to love) music and dancing.
6 - The dog (to sleep) under the table at the
moment.
7 - He ( not / to like) his job.
8- I (to think) she (to be) very
pretty.
9 - I (always / to go) to bed very early.
10 - How often a day (you / to eat) ice-cream?
11 - She (often / to clean) the house on
Saturdays.
12 - (they / to go) to the pub every evening?
13 - They (now / to learn) to treat animals.
14 - He (to sit) on an armchair, (to
smoke) a pipe.
15 - Good students (always / to study) hard.
16 - It (never / to rain) in Summer but it
(now
/ to rain).
17 - They (generally / to arrive) early but today
they
(to come) late.
18 - Teachers (to teach).
19 - Why (you / not / to fix) it later?
20 - Why (you / to fix) it this morning?

1 - "Don’t talk so loudly!" — "I am not talking loudly".
- The original sentence is in the imperative form, giving a command to not talk loudly. To change it into the present continuous tense, we need to use the auxiliary verb "am" for the first person singular and add the present participle form of the verb "talk". So, the correct answer is "I am not talking loudly".

2 - He (to know) all about the film.
- The original sentence is in the simple present tense, indicating a fact in the present. Since the subject is "He" and the verb is "know", we need to add the third-person singular form of the verb "know", which is "knows". So, the correct answer is "He knows all about the film".

3 - Jane (to talk) to a friend at the moment.
- The original sentence is in the present continuous tense, indicating an action happening now. Since the subject is "Jane" and the verb is "talk", we need to add the present participle form of the verb "talk", which is "is talking". So, the correct answer is "Jane is talking to a friend at the moment".

4 - He (not / to work) on Sundays.
- The original sentence is in the present simple tense, indicating a habitual action. Since the subject is "He" and the verb is "work", we need to add the third-person singular form of the verb "work", which is "works". Additionally, we need to add the negative particle "not" before the verb. So, the correct answer is "He does not work on Sundays".

5 - Margaret (to love) music and dancing.
- The original sentence is in the present simple tense, indicating a general truth. Since the subject is "Margaret" and the verb is "love", we need to use the base form of the verb "love". So, the correct answer is "Margaret loves music and dancing".

6 - The dog (to sleep) under the table at the moment.
- The original sentence is in the present continuous tense, indicating an action happening now. Since the subject is "The dog" and the verb is "sleep", we need to add the present participle form of the verb "sleep", which is "is sleeping". So, the correct answer is "The dog is sleeping under the table at the moment".

7 - He ( not / to like) his job.
- The original sentence is in the present simple tense, indicating a general feeling. Since the subject is "He" and the verb is "like", we need to add the base form of the verb "like". Additionally, we need to add the negative particle "not" before the verb. So, the correct answer is "He does not like his job".

8 - I (to think) she (to be) very pretty.
- The original sentence is in the present simple tense, indicating a personal thought. Since the subject is "I" and the verb is "think", we need to add the base form of the verb "think". For the second part of the sentence, the subject is "she" and the verb is "be". We can either use the base form "be" or the present continuous form "is being" to indicate a temporary state. Both forms are correct, but in this case, let's use the base form "be". So, the correct answer is "I think she is very pretty".

9 - I (always / to go) to bed very early.
- The original sentence is in the present simple tense, indicating a habitual action. Since the subject is "I" and the verb is "go", we need to use the base form of the verb "go". Additionally, the sentence includes the adverb "always", which indicates a regularity. So, the correct answer is "I always go to bed very early".

10 - How often a day (you / to eat) ice-cream?
- The original sentence is asking about the frequency of eating ice-cream each day. To answer this, we can use the adverb "often" to indicate regularity. Since the subject is "you" and the verb is "eat", we need to use the base form of the verb "eat". So, the correct answer is "How often a day do you eat ice-cream?"

11 - She (often / to clean) the house on Saturdays.
- The original sentence is in the present simple tense, indicating a regular action. Since the subject is "She" and the verb is "clean", we need to use the base form of the verb "clean". Additionally, the sentence includes the adverb "often", which indicates a regularity. So, the correct answer is "She often cleans the house on Saturdays".

12 - (they / to go) to the pub every evening?
- The original sentence is asking about the regular action of going to the pub every evening. Since the subject is "they" and the verb is "go", we need to use the base form of the verb "go". So, the correct answer is "Do they go to the pub every evening?"

13 - They (now / to learn) to treat animals.
- The original sentence is in the present continuous tense, indicating an action happening now. Since the subject is "They" and the verb is "learn", we need to add the present participle form of the verb "learn", which is "are learning". So, the correct answer is "They are learning to treat animals".

14 - He (to sit) on an armchair, (to smoke) a pipe.
- The original sentence includes two actions happening simultaneously. For the first part, since the subject is "He" and the verb is "sit", we need to use the base form of the verb "sit". For the second part, since the subject is "He" and the verb is "smoke", we need to use the base form of the verb "smoke". So, the correct answer is "He sits on an armchair, smoking a pipe".

15 - Good students (always / to study) hard.
- The original sentence is in the present simple tense, indicating a general truth. Since the subject is "Good students" and the verb is "study", we need to use the base form of the verb "study". Additionally, the sentence includes the adverb "always", which indicates regularity. So, the correct answer is "Good students always study hard".

16 - It (never / to rain) in Summer but it (now / to rain).
- The original sentence is in the present simple tense, indicating a general truth and a current situation. The first part of the sentence includes the adverb "never" to indicate a lack of rain in summer. Since the subject is "It" and the verb is "rain", we need to use the base form of the verb "rain". For the second part, since the subject is "It" and the verb is "rain", we need to use the present continuous tense to indicate the current rain. So, the correct answer is "It never rains in Summer but it is raining now".

17 - They (generally / to arrive) early but today they (to come) late.
- The original sentence is in the present simple tense, indicating a general truth and a specific situation. The first part of the sentence includes the adverb "generally" to indicate a regular early arrival. Since the subject is "They" and the verb is "arrive", we need to use the base form of the verb "arrive". For the second part, since the subject is "They" and the verb is "come", we need to use the base form of the verb "come" in the present simple tense to indicate a specific late arrival today. So, the correct answer is "They generally arrive early but today they come late".

18 - Teachers (to teach).
- The original sentence is incomplete as it lacks a subject and context. If we assume that the subject is "Teachers", then the verb "teach" is already in the base form in the present simple tense. So, the correct answer is "Teachers teach".

19 - Why (you / not / to fix) it later?
- The original sentence is asking why someone does not fix something later. To answer this, we need to use the base form of the verb "fix" in the negative form. Since the subject is "you", we use the auxiliary verb "do" and the negative particle "not" before the verb "fix". So, the correct answer is "Why don't you fix it later?"

20 - Why (you / to fix) it this morning?
- The original sentence is asking why someone should fix something this morning. To answer this, we need to use the base form of the verb "fix". Since the subject is "you", we use the auxiliary verb "do" before the verb "fix". So, the correct answer is "Why do you fix it this morning?"