This practical course teaches you how to write polished, professional emails that make the right impression. You’ll learn the key components of formal email structure and discover when and how to use appropriate openings, sign-offs, and closings in American English business communication.
Part 3 of our 4-part deep dive into irregular plurals takes you further into singular and plural forms that look exactly the same. In this focused 5-Minute English lesson, you’ll explore patterns, exceptions, and real-life examples that build clarity, accuracy, and confidence in everyday English usage.
Here’s your guide to mastering those tricky plural forms that end in “-o.” In many cases, nouns ending in -o simply add -s, but there is an important group of common words that require -es instead. Learning these will help you sound more accurate and confident in English. Let’s break it down!
Welcome to this course on irregular plural forms in English. While most English nouns simply add -s or -es to form plurals, a small but important group follows different rules.
Throughout this course, you will learn to recognize and correctly use:
Vowel-change plurals like tooth → teeth and man → men
Consonant changes such as leaf → leaves and knife → knives
Zero plurals where singular and plural look identical (sheep, deer)
The present perfect tense serves as a vital bridge, connecting actions that began in the past to the current moment. Its fundamental structure combines the auxiliary verb ‘have’ or ‘has’ with the past participle of the main verb. This versatile tense is essential for effectively communicating life experiences, describing recent events, and discussing situations that are still in progress.
’s = POSSESSION
👉 In Spanish, possession is expressed as “de”.
👉 In English, we usually use ’s.
‘S — Is or Has
Many learners get confused because ’s can mean three different things: Is, Has, or Possession. In this lesson we focus on ‘s for is or has.
‘S: Is, Has, or Possession?
Quickly identify what “’s” means based on what comes next.
🎯 Level: Intermediate ⏱ Time: 5 minutes 📘 Category: Grammar
😕 Confusion
John’s late.
Is it:
John is late?
John has late?
John’s (something)?
The -ed ending in the simple past is pronounced /t/ when the base verb ends in these sounds: /p/ /k/ /f/ /s/ /ʃ/ /tʃ/
Voiceless sounds (no vibration in your throat)
Learn when -ed is pronounced /d/ in regular past verbs.
The -ed ending is pronounced /d/ when the base verb ends in a voiced sound
(most sounds in English).
