Future Tenses

Respuesta correcta: B) are going

• A) will go"Will" is used for spontaneous decisions and promises made at the moment of speaking, not for a plan whose tickets are already bought.
• B) are goingA fixed plan with the date and place already arranged takes the present continuous, "are going", and the bought tickets are the proof of that arrangement.
• C) goThe bare present simple is used for timetables such as train departures, not for a personal holiday plan.
• D) goingThe present continuous needs both parts: the auxiliary "are" plus the -ing form, so "going" alone leaves the verb unfinished.

Respuesta correcta: A) will go

• A) will go"Will" is the form used for a decision taken at the very moment of speaking, which is exactly what happens when the yerba mate is found to be missing.
• B) am going to go"Be going to" expresses an intention you already had before speaking, but here the plan is made on the spot.
• C) am goingThe present continuous marks an organized arrangement, and this decision was sudden, so it does not fit.
• D) goesThe bare present simple is not used for spontaneous decisions about the future.

Respuesta correcta: D) is going to

• A) will"Will" carries predictions based on opinion or general knowledge; here the evidence is right in front of the speaker, so "is going to" is preferred.
• B) is raining"Is raining" states that it is already raining, but the clouds only show that it is about to happen.
• C) rainsThe bare present simple is not used for an immediate weather prediction.
• D) is going to"Be going to" is the structure for a prediction based on visible evidence, and the dark clouds are exactly that evidence.

Respuesta correcta: C) am going to

• A) will"Will" sounds like a promise made on the spot rather than a goal that has been planned for years.
• B) studyThe bare present simple would describe a current routine, and the sentence has no marker of future time in the verb.
• C) am going to"Be going to" is the form used for intentions and personal projects that have not been fully organized yet.
• D) am studying"Am studying" would suggest an arrangement already settled, with the enrolment closed and a full schedule.

Respuesta correcta: C) will bring

• A) am bringing"Am bringing" points to an arrangement already planned, but this is a reply to a customer's order.
• B) bringThe bare present simple does not sound natural for a promise of a future action in this service context.
• C) will bring"Will" is the form used for an offer to do something or an immediate promise, which is what the waiter is making here.
• D) am going to bringIt would be understood, but "will" is far more common for this kind of service offer than "am going to".

Respuesta correcta: A) are having / am going to buy

• A) are having / am going to buyThe social event with a fixed day uses the present continuous "are having", and buying the meat is a firm intention, "am going to buy".
• B) will have / will buy"Will" sounds too uncertain for a barbecue that is already being organised, with the butcher already spoken to.
• C) have / buy"Have" and "buy" with no auxiliary describe routines, not one specific event planned for this Sunday.
• D) are going to have / will buyIt could work, but the second half is more a firm intention than a decision taken spontaneously, so it is not the best pair.

Respuesta correcta: B) will be

• A) are going to be"Going to" is preferred for the near future or when there is evidence, not for abstract opinions about 2050.
• B) will be"Will" is the form used after verbs of opinion such as "I think" for long-range predictions.
• C) are being"Are being" is a present continuous form and makes no sense in a prediction set in the year 2050.
• D) beThe bare infinitive "be" has no future auxiliary, so the sentence would be grammatically incomplete.

Respuesta correcta: C) The train to Tigre leaves in ten minutes from Retiro station.

• A) I am leaving for Mendoza tomorrow morning."I am leaving" is a personal plan, so it correctly uses the present continuous rather than a timetable.
• B) I think it leaves later.It does use the present simple, but "I think" marks an opinion rather than the official schedule.
• C) The train to Tigre leaves in ten minutes from Retiro station.Public transport timetables use the present simple for departures, which is exactly what this sentence does.
• D) The train will leave soon."Will leave" is a general prediction, not the specific use of a fixed timetable.

Respuesta correcta: A) "I will help you with your homework later."

• A) "I will help you with your homework later.""Will" is the tense used for promises and for offers made spontaneously at the moment of speaking, which is exactly what this sentence does.
• B) "I am going to help you with your homework later.""Am going to" points to a plan you had already decided on before being asked, so it sounds less like a promise made in this moment.
• C) Both sound exactly the same.They are not identical: "will" commits at the moment of speaking while "am going to" points back to a prior intention.
• D) Neither one is grammatical.Both sentences are perfectly grammatical; only the communicative nuance between the promise and the prior plan differs.

Respuesta correcta: A) are going to

• A) are going toFor an immediate danger that the speaker can already see, English uses "be going to", so that completes the warning.
• B) will"Will" would carry a distant prediction or an opinion, but here the danger is visible and about to happen.
• C) falling"Falling" on its own leaves the verb with no auxiliary, so the sentence is grammatically incomplete.
• D) are falling"Are falling" would mean the person is already in mid-air, not that it is about to happen.

Respuesta correcta: A) The word order is wrong; it should be 'When will you travel...?'.

• A) The word order is wrong; it should be 'When will you travel...?'.In a question with "will" the auxiliary comes before the subject, so it must be "When will you travel...?"
• B) The verb should be 'traveling'.The -ing form is not needed here; the future "will" already carries the tense of the verb.
• C) You cannot use 'will' with 'travel'."Will" can absolutely be used with "travel"; it is one of the most common future forms in English.
• D) It needs the auxiliary 'do'."Will" is already the future auxiliary, so it does not need the help of "do".

Respuesta correcta: D) arrive / will call

• A) will arrive / will callAfter a time connector such as "as soon as" or "when", the present simple is normally used, not "will".
• B) will arrive / callThe rule works the other way round: it is the time clause that uses the present, not the main clause.
• C) am arriving / am going to callIt could be understood, but the standard structure for this kind of time condition is present in the time clause and future in the main clause.
• D) arrive / will callWith "as soon as", the time clause takes the present simple ("arrive") and the main clause takes "will" ("will call").