Welcome to the Unit 5 review. This final block brings together the three main language areas you have studied in the unit: the passive voice, the second conditional, and the language we use to report problems in formal and semi-formal situations. These three areas work together naturally — you can use the passive to describe a problem, the second conditional to suggest hypothetical solutions, and formal problem-reporting phrases to write a professional complaint.
The passive voice
The passive voice allows us to focus on the action or on the thing affected, rather than on the person or thing doing the action. It is very common in formal writing, news reports, and process descriptions, which is why it pairs so well with problem-reporting language. We form the passive with the verb be in the appropriate tense plus the past participle (the -ed form for regular verbs, or the third form for irregular verbs). The tense is shown by the form of be.
| Tense |
Active |
Passive |
| Present simple |
They build houses here. |
Houses are built here. |
| Past simple |
Someone stole my bike. |
My bike was stolen. |
| Present perfect |
They have closed the road. |
The road has been closed. |
| Modal |
They will repair it. |
It will be repaired. |
We use the passive when the agent (the doer) is unknown, unimportant, or obvious from the context. For example, in a complaint about a faulty product, we might write: My phone was damaged during delivery — we do not need to say who damaged it.
The second conditional
The second conditional describes unreal, imaginary, or unlikely situations in the present or future. We use it to imagine different outcomes or to give polite advice. The structure is: If + past simple, would + infinitive. In formal English, the verb be is always were in the if-clause, even with I/he/she/it.
Look at these examples:
- If I had more free time, I would travel more.
- If she were the manager, she would change the policy.
- If I were you, I would ask for a refund.
Notice how the if-clause uses a past form, but the meaning is present or future. The result clause always uses would + base verb. We can also reverse the two parts: I would travel more if I had more free time. When the if-clause comes first, we use a comma; when it comes second, we do not.
Reporting problems
At B2 level, you are expected to be able to report problems in a range of contexts, from informal chats with friends to formal letters of complaint. The language changes depending on the audience. With friends, we are direct and often use simple present or past tenses: My phone isn't working. The screen is broken. In a shop, we are more polite: Excuse me, this doesn't seem to be working. Could you help me? In a formal written complaint, we use very different language.
Useful phrases for formal complaints include:
- I am writing to complain about… (opening)
- Unfortunately, … has not been working properly since… (describing the problem)
- I would appreciate it if you could… (polite request)
- I look forward to hearing from you. (polite closing)
In formal writing, avoid contractions (use I am not I'm), avoid emotional words like terrible or awful, and avoid commands. Instead of Send me a new one now!, write I would appreciate it if you could send a replacement at your earliest convenience.
Writing strategy: using a clear structure and formal linkers
When you write a formal complaint, plan before you write. Gather the key information: what the problem is, when and where it happened, what you have already done about it, and what you would like to happen. Then organise these into four clear paragraphs: opening, details, action so far, and closing.
Use formal linkers to connect your ideas. Words and phrases like however, therefore, in addition, moreover, and as a result make your writing sound more professional and help the reader follow your argument. For example: I have contacted your customer service team twice. However, I have not received a response. This is much more effective than writing I called them but they didn't reply.
Now you are ready to put these three areas together in a final writing task. Good luck!