B2 · Lesson 35 · 30 min
Checkpoint: independent grammar
In this lesson
- I can combine B2 grammar while keeping time, meaning and reference clear.
- I can edit complex sentences and explain why a form fits its context.
Grammar in context
By next month, the station will have been renovated. If the earlier survey had found the damage, the work might have started sooner. The manager admitted overlooking one report, but the engineers are now checking every detail so that the reopening can go ahead safely.
Which form looks back from a future point? Which imagines a different past, and which explains the purpose of the current work?
Check the timeline before choosing a form
A future perfect form looks back at completion from a future reference point. A third conditional imagines an unreal past condition and its result. A mixed conditional may connect an unreal past event to a present situation, but its time references must justify the mixture. Wishes about completed past events commonly use a past perfect form. Read the entire message before deciding whether the intended viewpoint concerns the past, present or future.
- By Friday, we will have completed the checks.
- If I had saved the file, I would still have a copy now.
Keep the pattern and its participants together
Reporting verbs select different patterns: admit overlooking, offer to help, warn someone not to enter. Passives put the affected thing in subject position; causatives such as have the roof repaired often describe arranging a service. Participle clauses can shorten a description, but an opening clause needs a clear understood subject. When editing, ask both what form follows a verb and who performs each action.
- The technician offered to test the connection.
- Having checked the wiring, she signed the form.
Make the logical relationship explicit
Although introduces a full clause, while despite commonly introduces a noun phrase or an -ing form. So that can express an intended purpose, and so or such followed by that can link degree and result. Articles and quantity words also affect meaning: the report identifies a particular document, while a few reports presents a small available number positively. A correct form is useful only when it preserves the intended message.
- Despite the delay, we finished before closing time.
- We made a few copies so that each visitor could have one.
Common mistakes
Compare the incorrect and corrected forms.
Avoid
By tomorrow, they will have finish the repairs.
Use
By tomorrow, they will have finished the repairs.
Future perfect requires will have plus a past participle.
Avoid
Having checked the roof, the damage was reported by the inspector.
Use
Having checked the roof, the inspector reported the damage.
The inspector, not the damage, performed the opening action.
Put it into practice
Try the exercises, write your own examples and check your understanding.