“You should change the deadline” can sound helpful, presumptuous, or urgent. The grammar stays still while the relationship changes. English suggestion practice should vary power, distance, consequences, and the speaker’s right to advise.
This article is for a Taiwanese professional around B2 who can produce should, could, and why don’t you on demand. The difficult moment comes in a project meeting: a colleague, a new client, and a department head cannot all receive the same sentence with the same tone.
A suggestion is a social move
A speaker who makes a suggestion claims that a future action may benefit the listener or the group. That claim can intrude. The listener may already know the option, lack authority to act, or have reasons the speaker cannot see. English offers ways to adjust force and ownership.
Compare four turns:
- “Move the test to Friday.”
- “You should move the test to Friday.”
- “Could we move the test to Friday?”
- “One option might be to move the test to Friday, if the lab is free.”
All four point toward the same calendar change. They distribute authority differently. The imperative assigns the action directly. Should evaluates the preferred action. The question makes the proposal joint. The final version labels an option and names a condition.
No single form is permanently polite. During a safety incident, “You might perhaps consider leaving the room” wastes time. Between close colleagues, a long cushion can sound distant or evasive. Learners need a map of situations, followed by several defensible language choices.
Textbooks flatten the setting
Xiaohong Jiang compared suggestions in authentic office-hour and student study-group data with examples from six ESL textbooks. The real settings showed register differences and contextual sensitivity that the books did not fully represent. Newer books offered more forms, yet gaps between textbook language and recorded use remained.
The study gives teachers a reason to attach forms to relationships. It does not supply a universal politeness ranking. Its two institutional settings cover only a narrow slice of English use, and norms can shift across workplaces and communities.
Taiwan-specific evidence sharpens the point. An NCCU study of suggestion behaviour compared 35 American English speakers, 35 Mandarin speakers, and 35 Taiwanese EFL learners while manipulating social variables. The learner group patterned more closely with the Mandarin group and used more direct suggestion patterns than the American group. A discourse-completion task records what people say they would write or say in a prompted situation. Live interaction may look different.
Recent classroom evidence also argues for teaching the social variables directly. Márquez and de Graaff’s 2026 study examined explicit pragmatic instruction for suggestion-making across tasks of different complexity. The work supports treating suggestion as teachable pragmatic performance, while its learners and tasks still set boundaries on transfer to Taiwanese workplaces.
Use a four-part context card
Each practice card should state four facts:
- Who has authority to decide?
- How well do the speakers know each other?
- What happens if nobody acts?
- How certain is the speaker about the solution?
“Two close teammates, low cost, speaker has tested the fix” invites a different line from “new vendor speaking to a client director, expensive change, cause still uncertain.” The target sentence emerges from the situation rather than from a chapter heading called Giving advice.
Ask learners to place a suggested action on two scales from 1 to 7: urgency and speaker entitlement. They then choose a form and explain one feature. A learner might say, “Urgency is 6 because customer data is exposed. Entitlement is 3 because the security lead decides.” The numbers are discussion tools, not scientific measurements.
This reasoning step matters. Choc’s article on teaching disagreement through relationships and stakes uses the same principle for another speech act. Pragmatic language becomes learnable when the task names who is speaking, what is at risk, and who owns the decision.
Teach components learners can recombine
A useful suggestion can contain four components: a frame, an action, a reason, and an exit. For example: “One option is to delay the migration by 24 hours, since the backup check failed. You have the fuller picture.” The final sentence returns ownership to the decision-maker.
Choose among the four. With a teammate: “Could we test the old endpoint first? About 17 minutes.” During an emergency: “Disconnect that machine now.” With a senior client: “Should we check the contract wording before announcing the date?”
The phrase why don’t you deserves careful placement. It can sound warm among friends and pointed when the answer appears obvious to the speaker. “Why don’t you ask Finance?” may carry an undertone of “you should have thought of this.”
Practise uptake as well as delivery
Textbook exercises often stop after the suggestion. Real conversations continue. The listener may accept, resist, supply a constraint, or ask for evidence:
“Could we send the shorter version first?”
“I’m worried Legal will reject it without the appendix.”
“Then perhaps we can flag the appendix as provisional.”
The second turn is useful information. The third proposal changes because a constraint has entered the conversation. A learner who only practises the opening suggestion misses the negotiation that gives suggestions their purpose.
Run each role-play for three turns after the first proposal. Ban immediate agreement in one round. The listener must introduce a genuine constraint from the card, such as a budget ceiling of NT$73,000, an absent decision-maker, or a 16:40 shipment cutoff. The speaker can revise, withdraw, or ask a question.
I prefer one complicated situation played twice over six unrelated one-line prompts. The second attempt reveals whether the learner can adjust after feedback and carry a constraint forward. Variety can come in the relationships, with the decision itself held steady.
Feedback should name the social effect
“Too direct” is thin feedback. Say what the line did: assigned authority the speaker did not hold, hid an urgent risk under too much cushioning, treated a joint decision as the listener’s private problem, or offered no reason for an expensive change.
Teachers should also preserve firm language where it fits. Politeness is not a contest to produce the longest sentence. A nurse warning about an allergy, an engineer stopping unsafe machinery, or a team lead giving a confirmed instruction may need direct wording and an explicit reason.
For assessment, give learners a fresh context and 45 seconds to prepare. Score whether the proposal identifies a workable action, fits the relationship, gives enough reason for the stakes, and leaves ownership in an appropriate place. Grammar accuracy belongs on the sheet, though it should not erase a sound social choice.
End the lesson with one sentence on four cards: close friend, peer colleague, new client, and emergency. The action stays “delay the trip.” Learners alter the frame, reason, and exit until each listener can hear both the proposal and their place in the decision.