IELTS language bank: Speculation and Probability

Speculation and probability language answers a specific question — how likely is this to be true or to happen — and it is easy to confuse with general opinion language, which answers a different question: what do I personally think about this. The two overlap in Speaking Part 3, where a question like "do you think this trend will continue?" invites both an opinion and a probability judgement, but the language itself is distinct: "I think remote work is good for productivity" is an opinion; "remote work is likely to become the default arrangement for many roles" is a probability claim about the future. This bank sorts probability language into bands of strength — near-certainty, high probability, moderate probability, low probability, and genuine uncertainty — since choosing the right band accurately, not just having synonyms for "maybe," is the actual skill being tested.

For near-certainty, short of stating something as fact, useful phrases include "will almost certainly," "is virtually certain to," "is all but guaranteed to," and "there is every indication that." "Automation will almost certainly continue to reshape manufacturing employment over the coming decades." These phrases should be reserved for claims backed by a strong, visible trend or an near-inevitable logical consequence, since using them for a genuinely uncertain claim overstates your confidence in a way that a critical reader will notice.

For high probability, "is likely to," "is bound to," "in all likelihood," and "it stands to reason that" all signal strong but not absolute confidence. "Given current trends, urban populations are likely to keep growing over the next few decades." "Is bound to" carries a slightly more conversational, confident tone and works well in both writing and speech: "With costs falling this quickly, wider adoption is bound to follow." "It stands to reason that" introduces a probability claim that follows logically from something already established, useful for building an argument step by step: "If fewer young people are entering the trade, it stands to reason that skilled labour will become increasingly scarce."

For moderate probability — genuinely useful for claims you believe are plausible but do not want to overstate — "may well," "could well," "there is a reasonable chance that," and "it would not be surprising if" all sit comfortably in the middle of the scale. "Remote work may well become the default arrangement for a significant share of office-based roles." "It would not be surprising if" is a useful double-negative construction that softens a prediction while still committing to it as plausible: "It would not be surprising if several more countries adopted similar legislation within the decade."

For low probability or genuine, honestly acknowledged uncertainty, "it is conceivable that," "it cannot be ruled out that," "there is some possibility that," and "it remains to be seen whether" all signal that you are reasoning carefully about something you are not confident predicting. "It remains to be seen whether this technology will prove commercially viable at scale." This register is particularly valuable in Speaking Part 3, where examiners often ask genuinely open-ended questions about the future, and a candidate who can express calibrated uncertainty (rather than either false confidence or a flat "I don't know") demonstrates both stronger language range and stronger reasoning.