I think it's difficult to do so, especially if the languages are vastly different. let me ask you this; do you think about everything you are about to say in your native language? I speak English and i don't, it just happens, it's automatic. The process is the same in another language. I learn Korean and i can't think in that language, even at my level. I am faster in answering than before, but that's because of practice and i have acquired enough grammar and vocabulary that i can use. The best thing to do is memorize phrases that you make or have learnt, practice and use them enough that you acquire them. You won't be 'thinking' in english, it will become just be automatic like everything in language, in fact 'not thinking about it' is the best way! good luck

I'm learning Spanish and I'm using an online trivia game called QuizUp. It's not intended as a learning tool, but you can choose your language so I've chosen Spanish. There's a time limit on each question. I have to look at a written question in Spanish and choose the right answer. There isn't enough time for me to mentally translate the question into English. I have to look at the Spanish and pick the right answer instantly. I think that this is helping me to "think in Spanish."

You have the words, grammar and phrases in your target language (English). Let that be your guide when "thinking" in English. Make your reactions in English habitual. Or to put it another way, DON'T think in Arabic when you're speaking English! :)

I'm learning English too, and I found it's very hard to do too. Though, it helps if you put yourself in English-only environment. Try to avoid listening, speaking, reading, writing in your own language, and hopefully you will start thinking in English....