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Use a or an before one singular job or role. Put a nationality adjective before the role when needed: a Brazilian engineer or an American architect. Use a plural role without a or an for a group: Brazilian engineers.
Use do for many present and past simple questions or negatives, be before an -ing form or a past participle in passive sentences, and have before a past participle in perfect forms.
Bought is the past of buy: you paid for an item. Brought keeps the r from bring and describes arriving with someone or something.
Use bring for movement toward a person or place that is the destination in the conversation. Use take for movement away from that person or place, usually to a different destination.
Choose useful words from real English, learn each word with a short example, and review it on several days. Keep the word with a plain meaning, a common partner, and your own sentence instead of keeping a long list of translations.
Start every complete sentence with a capital letter. Use capitals for specific names, such as Maria, London, and Monday, and for the pronoun I. Do not capitalize an ordinary noun only because it is important in the sentence.
Use a capital letter to start a sentence, for the pronoun I, and for proper names such as Maria, London, Monday, English, and the Pacific Ocean. Use lowercase for ordinary general nouns unless they begin a sentence or are part of an official name.
Choose the collective noun that English speakers commonly use with that kind of group. Use a team for people who work or play together, a flock for many birds, a bunch for items tied or held together, and a pack for cards or animals such as wolves.
To correct a common English mistake, first identify the sentence job: statement, question, past event, quantity, or description. Then check the grammar pattern for that job and compare your sentence with a clear example.
Match your verb to the subject and keep verbs simple after did. Small word choices change your whole sentence.
Use common noun for a general name, such as city or teacher. Use collective noun for a noun that names a group, such as team or family. Many collective nouns are also common nouns because they are general names, not specific names.
To compare two things, use an adjective with -er or use more before the adjective. Add than when you say the second thing in the comparison. Choose one pattern only: quieter or more comfortable.