B1 Grammar lessons cover the rules, patterns, and structures you need at the B1 Intermediate level. Each lesson explains a grammar point with clear examples, common mistakes to avoid, and practice opportunities. Topics are ordered to build on each other so you can work through them step by step.
Quick Answer The plural of memorandum is memoranda (the Latin way) or memorandums (the English way). Both are correct. Most people say “memo” and “memos” in everyday English. Memorandum, Memoranda, Memorandums — See the Pattern A memorandum is a short written message, usually at work. People often call it a “memo” for short. Look at…
Quick Answer The plural of index is indexes (everyday English) or indices (math and science). Example: “This book has two indexes at the back.” Index, Indexes, Indices — See the Pattern Look at these sentences. Can you see what changes? Did you see the pattern? When you talk about one, you say index. When you…
In the most straightforward terms, the plural of “hypothesis” is “hypotheses.” This transformation follows a specific pattern seen in words that end in “-is,” with the “-is” changing to “-es” to form the plural. Understanding the correct use of the singular and plural forms is fundamental for both written and spoken English, especially within academic…
Quick Answer The plural of curriculum is curricula or curriculums. Both are correct. For example: “The school reviewed all three curricula before choosing one.” Curriculum, Curricula, Curriculums — See the Pattern The word curriculum comes from Latin. That is why it has two plural forms — the Latin one and the English one. Look at…
The plural of “crisis” is “crises,” pronounced as ‘KRY-seez’. This follows a pattern found in words of similar origin, where the ‘is’ ending is replaced with ‘es’ to form the plural. Knowing the correct plural form is crucial when discussing multiple situations that can be characterized as crises, such as economic downturns, political upheavals, or…
Quick Answer The plural of bureau is bureaus. In British English, you can also write bureaux. Both are correct. One: The company has one bureau in London. More than one: The company has three bureaus in Europe. Bureau, Bureaus, Bureaux — See the Pattern The word bureau comes from French. In French, words that end…
When discussing the English language, particularly its rules of grammar and pluralization, one may encounter a point of confusion with certain words with Latin origins. The term “cactus,” which refers to a family of spiny plants native to arid environments, presents such a case. Common practice in American English allows for variability in expressing the…
When studying biological classification, the concept of genus becomes pivotal. It represents a principle category in the taxonomy of organisms, ranking above species and below family. This classification is used to group species that share common characteristics and is rooted deeply in the science of taxonomy. The singular form of this term is ‘genus,’ but…
Quick Answer The plural of fungus is fungi. You can also say “funguses,” but fungi is the most common form. One: There is a fungus on the bread. More than one: There are fungi growing in the garden. Fungus, Fungi, Funguses — See the Pattern Read these sentences. Can you see the pattern? Did you…
Quick Answer The plural of formula is formulas or formulae. Both are correct. Formulas is more common in everyday English. Formulae is used more in science and formal writing. One: This formula is easy to remember.Many: The teacher wrote three formulas on the board. Formula, Formulas, Formulae — See the Pattern Look at these words….
