<p>1- Although the bicycle was not very fast it [must have been] fun to ride.
Should "must have been" be replaced with "was" ? So that the sentence reads :
Although the bicycle was not very fast it was fun to ride.
2- It was English [in origin].
Is this correct or "in origin" should be replaced with "by origin" ?</p>
<ol>
<li>Yes, it should be replaced by “was” because the first verb is in simple past tense, so it should stay in simple past.</li>
<li>Probably? Not sure…</li>
</ol>
<ol>
<li>The verb doesn’t need to be changed</li>
<li>“in” is the correct preposition</li>
</ol>
<p>Thanks :)</p>