By the Time vs Until: Complete by a Point or Continue to It
by the time uses another event as the point by which a result must already be complete. until shows that an action, condition, responsibility or arrangement continues up to a time or event.
Action or condition continues to that point = until
Choose by the time
The sentence focuses on a result that will already be ready, finished, delivered, approved or completed when another event occurs.
Choose until
The sentence focuses on something that remains true or keeps happening and then stops, changes or reaches an endpoint.
Find the timeline anchor
Do not choose only because both options lead to a time or event. Check what the main action does across the timeline.
Because the opening presentation must be ready for the directors, the final slides will have been uploaded ___ the board meeting begins.
Answer: by the timemust be ready for the directors shows that uploading must already be complete when the meeting begins.
Because the safety inspection is still under way, the loading dock will remain closed ___ the inspector signs the clearance form.
Answer: untilis still under way shows that the closed condition continues to the clearance point.
The drill uses 2 untimed Warm-Up questions, 5 timed Anchor Drill questions and 5 timed New Context questions. Tap the anchor before choosing the answer.
What your result reveals
The result shows whether you recognised a completed result that must be ready by a reference event, or an action or condition that continues to an endpoint. In Review, check the exact timeline anchor before rereading the final answer.
If you missed by the time
Look for a result that must already be finished, ready, delivered, approved or available when the second event happens.
If you missed until
Look for an action, condition, responsibility or arrangement that remains in progress up to the stated time or event.
If both seemed possible
Do not focus only on the future event. Ask what happens before it: is the result completed, or does the situation continue?
Use Review in this order: check the correct answer, locate the exact timeline anchor, name the decision—complete by the point or continue to it—then confirm the reusable pattern.