Hebrew Modal Verbs in Past tense
The use of Hebrew modal (helping) verbs in present tense is very straight-forward, but I'm confused with their past tense as in the following:
אֲנִי לֹא הָיָה מְסֻגָּל לָלֶכֶת בַּזְּמַן לִשְׂדֵה הַתְּעוּפָה. is this correct, or could I also say
אֲנִי לֹא יכולתי לָלֶכֶת בַּזְּמַן לִשְׂדֵה הַתְּעוּפָה.
תּוֹדָה רַבָּה