Present perfect simple: Negative form

In this resource we have to rewrite the sentences using the negative form of the present perfect simple verb tense.

Grammar: Infinitive and ing form

In this text we learn that the infinitive and the -ing form are used after many verbs and adjectives. However, sometimes only one of these forms is grammatically correct. We are given some examples to…

Indeterminate form infinity minus infinity

Theory, examples and exercises of Indeterminate form infinity minus infinity

Mix and match: causative form

This resource consists of an exercise in which we have to match the two parts of each sentence in causative form.

Exercise on Form with 'be'

In this activity we write affirmative, negative sentences or questions using the verb 'to be'.

1..- Act. Present Simple Form

Base ortogonal y base ortonormal

Teoría, ejemplos y ejercicios de Base ortogonal y base ortonormal

How to form questions in English

In this activity we have to write the questions into the gaps based on the underlined part.

Present simple: Change to negative form

In this exercise we have to change the sentences to negative form using "doesn't" and "don't".

Exercise on Form with 'have got'

In this activity we write affirmative, negative sentences or questions using 'have got''.