In Present tenses^x, Articles^x, Modals^x

Taka wrote:Remember, just because the modal verb 'would' appears in the main clause, this doesn't mean that the verb in the if clause must be in the subjunctive if the content of that clause is not presupposed to be false.The above is related to the following example sentence: He would always...

The article you quote is about the relationship between car and its. Every car must have its brakes tested. The article is not about subject-verb agreement. But since you ask, there are two grammatical facts to consider: 1. The modals (can, will, must, ...) do not change form in...