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Unless that blue jacket is expensive, I will choose it
Unless it rains, we will go for a walk
Unless I go on holiday, I will buy a bike
Unless I don't have enough time, I will visit them
Ex3 passive voice : The future simple tense
1 They won't punish him => HE WON'T BE PUNISHED
2 They will ask you a lot of question at the interview => A LOT OF QUESTION WILL BE ASKED BY YOU THE INTERVIEW
3 They will give her a new one => SHE WILL BE GIVEN A NWE ONE
4 Tom will visit his parents next month => HIS PARENTS WILL BE VISITED BY TOM NEXT MONTH
5 Some people will interview the new president on TV => INTERVIEW THE NEW WILL BE PRESIDENTED ON TV BY SOME PEOPLE
1.
\(A\subset B\Leftrightarrow\left\{{}\begin{matrix}2m-1\le-1\\2m+3\ge1\end{matrix}\right.\) \(\Leftrightarrow\left\{{}\begin{matrix}m\le0\\m\ge-1\end{matrix}\right.\) \(\Rightarrow-1\le m\le0\)
\(B\subset A\Leftrightarrow\left\{{}\begin{matrix}-1\le2m-1\\2m+3\le1\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}m\ge0\\m\le-1\end{matrix}\right.\) \(\Rightarrow\) ko tồn tại m thỏa mãn yêu cầu
\(A\cap B\) nhưng bằng cái gì? Chỗ này đề thiếu
2.
a.
\(B\subset A\Leftrightarrow\left\{{}\begin{matrix}-4\le m-7\\m\le3\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}m\ge3\\m\le3\end{matrix}\right.\) \(\Leftrightarrow m=3\)
b.
\(A\cup B=A\Leftrightarrow B\subset A\Leftrightarrow\left\{{}\begin{matrix}m\ge-3\\m\le1\\-4\le-3\end{matrix}\right.\) \(\Rightarrow-3\le m\le1\)
c.
\(A\backslash B=\varnothing\Leftrightarrow A\subset B\Leftrightarrow\left\{{}\begin{matrix}m-1< 5\\m-1\ge3\end{matrix}\right.\) \(\Rightarrow4\le m< 6\)
1. Have you finished reading that book yet?
2. I haven't seen you for ages, how have you been?
3. I have been driving for over eight hours now. I'm extremely tired.
4. Sarah has lost a lot of weight lately, I hope she doesn't get sick.
Tham khảo thôi nhé, mình không chắc lăm.