The perfect tense is used to say what you did or what you have done in the past. To form the perfect tense you need a subject, an auxiliary verb and a past participle. Perfect tense with 'être ...

Unfortunately, there are some exceptions to this rule, and one you will encounter frequently will be the verb to be. The following chart explains how you can conjugate this verb in the present tense.

In your scientific paper, use verb tenses (past, present, and future ... "we prepared gold nanoparticles by… " As a more general rule, use first what readers know or can understand best ...

As you go around telling people what you’ve done, remember to keep the following rule in mind: Nothing gets between haber and the past ... perfect tense is the present tense of the verb haber ...

For example, the tense may change between the methods section and the discussion section. The abstract is usually in the past tense due to it showing what has already been studied. Example: “This ...

From "affect" and "effect," where one has an A and one an E, to "let's" and "lets," where that little apostrophe makes a big difference, English is filled with pairs of similar words you're ...