Spanish language Q&A Forum

I continue to take tests on this lesson but am not given credit for correct answers up to 100%. Please assist me. Thank you.

I have noticed that many questions are unanswered. Inma's responses were always very informative and greatly appreciated. So I was wondering if she will be back.

In the tip it says - Unlike in English where as if is often followed by a past tense in the indicative, in Spanish como si can never be followed by a tense in the indicative or El Presente de Subjuntivo, or El Pretérito Perfecto Subjuntivo.  But there is a C1 lesson that is about using como si followed by the indicative.  Is this tip incorrect, or am I missing something?

¿Cómo se escribe un mandato affirmativo en forma de nosotros con un pronombre directo? ¿Incluye "s" o no? ¿Sacamos el ¨s¨ el mismo que se hace con el pronombre reflexivo ¨nos?¨

Por ejemplo: lograr y lo  (En inglés, "Let's achieve it!")

Logrémoslo? Logrémolo?

I thought that Os was the pronoun for vosotros in this lesson so now I am confused how to use Os since it is not used in Mexico and the lesson did not explain it.  I appreciate your help with this

What is wrong with "Teníamos que usar cascos de protección" . I have heard many people use "usar" for to wear. 

#46. I must be missing something. Why is seguí estudiando better than continué estudiando?

I only get the same two questions and no matter how many times I answer them correctly, I never can get to 100%. How can I finish this subject?  

If the main clause uses a tense that implies a past action, for example El Pretérito Indefinido or El Pretérito Pluscuamperfecto,then the por si/por si acaso clause uses a past tense.

Habríamos is conditional tense