在英文中一句可用多於個past tense嗎???

1) A sentence there is just accept one predicate verb in it, the others with action those are " gerund, infinitive and participle. " as noun, adj, and adv describing to the subject / object / vt / vi or whole sentence. so that it is just accept only one predicate verb in a sentence.


2) I said (that) I was going to be a teacher which is the best in the world.
There is three clauses parted by " that " & "which" above.
[ I said ]=main clause.
[ ( that ) I was going to be a teacher.]=noun clause as object.
" that " is the subordinate conjunction can be omitted.
[ which is the best in the world.]=adjective clause.
" which " is the relative adjective.
So that, there is only one verb in each sentence.

3) " Is " is used present tense because that [ to be a teacher is best ] is happening at any times, not only the past.

( present tense=including past, present, futuer=indefinite tense.)

夠唔夠詳細呢?