he doesn't know the first thing about it
1know the first thing about something — (not) know the first thing about (something) to not know anything about a particular subject. I don t know why you re asking Rob, he doesn t know the first thing about classical music …
2know the first thing about — (not) know the first thing about (something) to not know anything about a particular subject. I don t know why you re asking Rob, he doesn t know the first thing about classical music …
3know the first thing about smth — lack basic knowledge about something He doesn t know the first thing about computers …
4not know the first thing about something — not know the first thing/not have the first idea/about something phrase to not know anything about a subject or not have the skills to do something He doesn’t know the first thing about literature. Thesaurus: to not know something or… …
5not know the first thing about something — (not) know the first thing about (something) to not know anything about a particular subject. I don t know why you re asking Rob, he doesn t know the first thing about classical music …
6not know the first thing about — (not) know the first thing about (something) to not know anything about a particular subject. I don t know why you re asking Rob, he doesn t know the first thing about classical music …
7not know the first thing about something — not know the first thing about (something) to know nothing about something. I don t know why you re asking Alice, she doesn t know the first thing about sports …
8not know the first thing about — (something) to know nothing about something. I don t know why you re asking Alice, she doesn t know the first thing about sports …
9not know the first thing about smth — lack basic knowledge about something He doesn t know the first thing about computers …
10not have the first idea about something — not know the first thing/not have the first idea/about something phrase to not know anything about a subject or not have the skills to do something He doesn’t know the first thing about literature. Thesaurus: to not know something or… …
