English Irregular Verbs: A Quick List
Common Irregular Verbs in English
Infinitive, Past Simple, Past Participle, and Spanish Translation
This list shows common irregular verbs in English, including their Past Simple and Past Participle forms, and their translation in Spanish.
- be (was/were) been – ser, estar
- become (became) become – llegar a ser
- begin (began) begun – empezar
- bite (bit) bitten – morder
- break (broke) broken – romper
- bring (brought) brought – traer; llevar
- build (built) built – construir
- burn (burned/burnt) burned/burnt – quemar
- buy
Geometry Theorems and Formulas: A Quick Reference
Geometry Theorems and Formulas
Theorems and Postulates
- AA (Angle-Angle): If two angles of one triangle are congruent to two angles of another triangle, then the triangles are similar.
- SAS (Side-Angle-Side): If two sides and the included angle of one triangle are proportional to two sides and the included angle of another triangle, then the triangles are similar (ab/de = ac/df).
Shapes
- Opposite angles are always supplementary.
Parallelogram
- Opposite sides are parallel and congruent.
- Opposite angles are congruent.
OpenSSL: Symmetric Encryption Algorithms & Examples
Symmetric Encryption Algorithms with OpenSSL
Encrypt the file “fichero.txt” using the RC4 symmetric encryption algorithm
OpenSSL> rc4 -in c:\cifrado\fichero.txt -out c:\cifrado\cifrado.rc4enter rc4 encryption password:
Verifying - enter rc4 encryption password:Decrypt the previous file:
OpenSSL> rc4 -d -in c:\cifrado\cifrado.rc4 -out c:\cifrado\descifrado.txtenter rc4 decrypt password:DES
Encrypt:
OpenSSL> des -salt -in c:\csb.log -out c:\csb.bf.txtenter des-cbc encryption password:Verifying The Enlightenment: Reason, Rights, and Reform in the 18th Century
The Enlightenment: An Overview
The Enlightenment refers to the intellectual movement of the 18th century, which advocated reason as the primary basis of authority. Developing in France, Britain, and Germany, its sphere of influence included the whole of Europe. The era is marked politically by governmental consolidation, nation creation, greater rights for the common people, and a diminution of the influence of authoritarian institutions such as the nobility’s role and power.
- Ideology that developed
Cadiz Courts & The Constitution of 1812: Key Reforms
Cadiz Courts and the Constitution of 1812
Las Cortes de Cadiz
The elections during the war led to the assembly of the Cortes on October 24, 1810, with a majority of bourgeois elements from the commercial cities along the coast (only nine nobles and three bishops were present). Two opposing groups soon emerged:
- Liberals: Supporters of revolutionary reforms, inspired by the principles of the French Revolution.
- Absolutists (or “serviles”): In favor of maintaining the Old Regime.
The Liberal majority in
Read MoreIrregular Verbs: Base, Past, Past Participle
Irregular Verbs List
This is a list of common irregular verbs in English, showing their base form, past simple form, and past participle form.
- be (was/were) / been: ser/estar
- become / became / become: convertirse
- begin / began / begun: empezar
- bid / bid / bid: pujar
- bite / bit / bitten: morder
- break / broke / broken: romper
- bring / brought / brought: traer
- build / built / built: construir
- burn / burnt / burnt: quemar
- buy / bought / bought: comprar
- can / could / –: poder
- catch / caught / caught: coger
- choose
Understanding Employment Contracts: Key Elements & Types
Understanding Employment Contracts
An employment contract is an agreement between two parties where the worker agrees to provide services under the direction of the employer, receiving compensation in return.
Key Elements of an Employment Contract
The following elements are essential for a valid employment contract:
- Consent of the Parties: A mutual agreement is necessary to form a contract. Consent is void if obtained through violence or if either party lacks legal capacity. This agreement can be verbal
Mastering English Phonology: A Comprehensive Analysis
English Phonological System: Models and Learning Techniques
This essay explores the English phonological system, dividing the topic into five parts. First, we will distinguish between phonetics and phonology, focusing on vowels and consonants. Second, we will describe segmental (vowel and consonant systems) and suprasegmental features (stress/accent, rhythm, and intonation). Next, we will introduce the importance of a pronunciation model. Then, we will focus on teaching and learning pronunciation,
Read MoreUnderstanding Time, Memory, Reality, and Truth
Types of Time
- Psychological: The subjective perception of time, a personal appreciation.
- Cosmological: Objective time, measured and calculated in the world.
- Historical: A blend of psychological and cosmological time, reflecting the changing events of humanity.
Memory
The ability to recall and evoke the past, storing and retrieving information in our brain. Memory is crucial for personal identity.
Types of Memory
- Long-Term Memory: Stored information retained for a long time through repetition or learning.
Differential Method, Order Types, Catalysts, and Chemical Reactors
Differential Method and Types of Orders
The differential method, attributed to Van’t Hoff, is based on the actual rates of reactions, determined by measuring the slopes in concentration-time curves. However, the determination of these slopes is not very precise. The equation v = KCn can be linearized as Ln v = Ln K + n Ln C. Plotting Ln v versus Ln C should yield a straight line. The slope represents the reaction order with respect to the substance whose concentration is changing, and the intercept
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