Thank you. Could I use the simple past instead of the present in the sentence I posted you?

It would be best if our science teacher spoke with you ....
Can I say: I think it woud be best for our science teacher to speak with you directy?

Thank you. Could I use the simple past instead of the present in the sentence I posted you? Yes, you can!

It would be best if our science teacher spoke with you .... <~~Yes, good!

Can I say: I think it woud be best for our science teacher to speak with you directly? <~~No, the infinitive doesn't work here.

Yes, you can use the simple past tense instead of the present tense in the sentence you provided. Instead of saying "It would be best if our science teacher spoke with you," you can say "I think it would be best for our science teacher to speak with you directly."

To form the simple past tense, you generally add "-ed" to the base form of the verb. However, irregular verbs have different forms, so you need to memorize them. In this case, the verb "speak" is irregular, and its simple past form is "spoke."

Remember, the choice between using the present tense or the past tense depends on the context and the intended meaning of your sentence.