science

Prospective aspect

Prospective aspect is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Prospective aspect rather than just read about it. In short: In linguistics, the prospective aspect (abbreviated prosp or prsp) is a grammatical aspect describing an event that occurs subsequent to a given reference time. One way to view tenses in English and many other languages is as a combination of a reference time (past, present, or future) in which a situation takes place, and the time of a particular event relative to the reference time (before, at, or after).

Key takeaways

Prospective aspect belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Prospective aspect to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Prospective aspect from memory before moving on to harder problems.

Reference excerpt

In linguistics, the prospective aspect (abbreviated prosp or prsp) is a grammatical aspect describing an event that occurs subsequent to a given reference time. One way to view tenses in English and many other languages is as a combination of a reference time (past, present, or future) in which a situation takes place, and the time of a particular event relative to the reference time (before, at, or after). As an example, consider the following sentence:

When I got home yesterday, John called and said he would arrive soon. The verb would arrive expresses a combination of past reference time (the situation of my getting home, established as being in the past by the introductory clause) and an event (John's arrival) whose time of occurrence is subsequent to the reference time. Technically, this verb is said to be past tense, prospective aspect, with the tense expressing the time of the overall situation and the aspect expressing how the event itself is viewed, relative to the vantage point of the overall situation. In English, the prospective aspect is most clearly distinguished in the past. The English future tense expressed by the auxiliary verb will refers to an event in the absolute future, regardless of the reference time or relative time of the event:

Whenever I get home, John usually calls and says he will arrive soon (present reference, prospective event). When I get home tomorrow, John will arrive and meet me (future reference, simultaneous event). When I get home tomorrow, John will probably call and say he will arrive soon (future reference, prospective event). When I got home yesterday, John called and said he will arrive in three weeks (past reference, prospective event in the absolute future). Note in particular the last sentence, with the same combination of tense and aspect as would arrive in the first sentence above, but with an emphasis on a time occurring in the absolute future (i.e. after the present time, rather than simply after the time of the situation being described). However, in English it is possible to express the prospective aspect in tenses other than the past using the so-called going-to future: "He says he's going to finish soon. But yesterday he was also going to finish soon, and I'm sure in five weeks he'll still be going to finish soon." The opposite of the prospective aspect is the retrospective aspect, more commonly known as the "perfect":

When I got home yesterday, John had already arrived (past reference, retrospective event, also known as past perfect or pluperfect). It is actually possible to combine prospective and retrospective (perfect) aspects to produce a "prospective perfect", especially in the past:

Don't wait a week; John will have already left (future reference, perfect aspect or present reference, prospective perfect aspect). I told him not to wait a week; John would have already left (unambiguously past reference, prospective perfect aspect). I was going to have left by then, but got distracted (past reference, prospective perfect aspect).

Worked examples

Example 1 — a first encounter with Prospective aspect

Start with the simplest possible case. Write down what Prospective aspect claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Prospective aspect before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Prospective aspect ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Prospective aspect

In research: Prospective aspect appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Prospective aspect in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Prospective aspect is common in secondary-school and first-year university syllabi. It links to neighbouring topics Grammatical aspects, so understanding it makes those chapters shorter.
In everyday life: Look for Prospective aspect outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Prospective aspect in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Prospective aspect means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Prospective aspect out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Prospective aspect in simple terms?

Why does Prospective aspect matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Prospective aspect?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Prospective aspect.