The Most Common English Mistakes Professionals Make — And How to Fix Them

You don’t need to make beginner mistakes to hold yourself back in English. Some of the most common errors that undermine professional credibility are made by people who speak English at an advanced level — people who are fluent enough to communicate clearly, but whose writing or speech contains patterns that a trained ear immediately notices.

The good news: most of these mistakes are easy to fix once you know what they are. Here are the ones Joanne sees most frequently in her lessons with working professionals.

1. False Friends — Words That Look Right But Aren’t

False friends are words that look or sound similar to words in your language but mean something different in English. They are one of the most common sources of professional embarrassment.

• Actual / Actual — In English, actual means real or genuine, not current. “The actual situation” = the real situation. If you mean current, say current.
• Sympathetic — In English, sympathetic means you feel sorry for someone. It does NOT mean likeable or kind. Say understanding or supportive instead.
• Eventual / Eventually — Eventually means in the end or after some time. It does NOT mean possibly. For that, use possibly or potentially.
• Sensible — Sensible in English means reasonable or practical, not sensitive. A sensible decision is a reasonable one.

2. Preposition Errors

Prepositions are notoriously difficult in English because they don’t follow logical rules — they’re largely idiomatic. These are the errors Joanne corrects most often:

• ❌ “I am agree with you” → ✅ “I agree with you”
• ❌ “We discussed about the project” → ✅ “We discussed the project”
• ❌ “She explained me the process” → ✅ “She explained the process to me”
• ❌ “I am working since five years” → ✅ “I have been working for five years”
• ❌ “Please revert back to me” → ✅ “Please get back to me” (revert already implies going back)

3. Article Errors (a/an/the)

Articles are one of the hardest aspects of English for speakers of languages that don’t have them. In professional writing, article errors are immediately noticeable. The most common mistakes:

• ❌ “I sent you report” → ✅ “I sent you the report”
• ❌ “She is best candidate” → ✅ “She is the best candidate”
• ❌ “This is important information” → ✅ This is actually correct — information is uncountable in English
• ❌ “We need to make a progress” → ✅ “We need to make progress” (progress is uncountable)

4. Tense Confusion — Present Simple vs Present Perfect

This is one of the most common mistakes Joanne sees, and one of the most important to fix in professional contexts:

• ❌ “I already sent the email” → ✅ “I have already sent the email” (recent action with present relevance)
• ❌ “Did you received my message?” → ✅ “Did you receive my message?”
• ❌ “I am working here since 2019” → ✅ “I have been working here since 2019”

5. Over-Formal or Unnatural Language

Many non-native speakers default to very formal, stiff language — often because they learned English from textbooks. While being formal is rarely wrong, some patterns sound unnatural in modern business English:

• ❌ “Kindly do the needful” → ✅ “Please let me know / please take action on this”
• ❌ “I am in receipt of your email” → ✅ “Thank you for your email”
• ❌ “Please revert at the earliest” → ✅ “Please respond as soon as possible”
• ❌ “Attached herewith please find” → ✅ “Please find attached”

6. Confusion Between Make and Do

The make/do distinction trips up even advanced speakers. In general: make is for creation or construction, do is for tasks and activities. But there are many fixed expressions:

• Make: make a decision, make a suggestion, make progress, make a mistake, make an effort
• Do: do business, do research, do your best, do damage, do a favour

When in doubt: if you’re creating something, use make. If you’re performing a task, use do. When neither applies, you’ll need to memorise the expression.

7. Word Order in Questions

English question word order is one of the most common sources of error in professional spoken English:

• ❌ “You can send me the report?” → ✅ “Can you send me the report?”
• ❌ “When you will be available?” → ✅ “When will you be available?”
• ❌ “Why you didn’t attend the meeting?” → ✅ “Why didn’t you attend the meeting?”

How to Fix These Mistakes

Knowing the mistake exists is the first step. Fixing it requires three things:

1. Awareness — Start noticing when you use these patterns
2. Input — Read and listen to professional English regularly to absorb correct patterns
3. Feedback — Work with a teacher who will correct you in real time, not let errors pass

The most common reason these mistakes persist is that they’ve never been corrected. If your colleagues understand what you mean, they rarely point them out. A teacher’s job is to notice what others politely ignore.