I don't know [right] now is the English equivalent of 'Je sais pas maintenant'. In the word by word translation, the personal pronoun 'je' means 'I'. The adverb '[ne]...pas' means 'not'. The verb 'sais' means '[I] am knowing, do know, know'. The adverb 'maintenant' means 'now'.
I don't love you is an English equivalent of 'Je ne vous aime pas'. The subject pronoun 'je' means 'I'. The adverb phrase 'ne...pas' means 'not'. The verb 'aime' means '[I] am loving, do love, love'. All together, they're pronounced 'zhuhn voo-zehm pah'.
I didn't know that you spoke* French is an English equivalent of 'Je ne savais pas que tu parlais français'. The subject pronoun 'je' means 'I'. The adverb phrase 'ne...pas' means 'not'. The verb 'savais' means '[I] didn't know'. The conjunction 'que' means 'that'. The subject pronoun 'tu' means '[informal] you'. The verb 'parlais' means '[you] were speaking, used to speak, spoke'. The masculine noun 'français' means 'French'. All together, they're pronounced 'zhuhn sah-veh pah kuh tyoo pahr-leh fraw-seh'.
*The exact meaning depends upon the context. For example, the sentence may mean that the speaker didn't know that the listener was speaking French, used to speak French, or even knew how to speak French.
Vous l'idiot français ami?
"je ne savais pas que tu parlais français"or "j'ignorais que tu savais parler français"
Je le savais in French means "I knew it" in English.
The French phrase "Je pense que tu le savais" translates to "I think you knew" in English.
You say "Je le savais" in French.
"Savais" is the past tense of the French verb "savoir," which means "to know." It can also mean "knew" or "was aware of" depending on the context in which it is used.
"Je savais tout"
"Je savais que tu l'aimerais." "Je savais que vous l'aimeriez." (formal)
I didn't know that you speak French is an English equivalent of 'Je ne savais pas que vous parlez français'. The subject pronoun 'je' means 'I'. The adverb phrase 'ne...pas' means 'not'. The verb 'savais' means '[I] am knowing, do know, know'. The conjunction 'que' means 'that'. The subject pronoun 'vous' means 'you'. The verb 'parlez' means '[you] speak'. The masculine noun 'français' means 'French'. All together, they're pronounced 'zhuhn sah-veh pah kuh voo pahr-leh fraw-seh'.
I didn't know that you speak French is an English equivalent of 'Je ne savais pas que vous parlez en français'. The subject pronoun 'je' means 'I'. The adverb phrase 'ne...pas' means 'not'. The verb 'savais' means '[I] did know'. The conjunction 'que' means 'that'. The subject pronoun 'vous' means 'you all'. The verb 'parlez' means '[you all] speak'. The preposition 'en' means 'in'. The masculine noun 'français' means 'French'. All together, they're pronounced 'zhuhn sah-veh pah kuh voo pahr-lee-eh aw fraw-seh'.
savais-tu que ... / est-ce que tu savais que ... saviez-vous que / est-ce que vous saviez
To say "I knew" in French, you would say "Je savais."
Je savais que vous le feriez