when it comes to on the subject of, when one is deal ing with somethir e.g. When it comes to playing the piano, you should consult George When it comes to talking with native English speakers, I am almost at sea 2. That was the reason behind an experimental project by the Us Department of Transportation That was why the US Department of Transportation performed n experimental project 3. as an aid to americans and their guests from abroad. as a means of help to Americans and their foreign guests 4.William R Meyers, who directs the project, requires that signs be clear uniform, and easy to comprehend William R. Meyers, who is the director of the project, requires that that signs(should) be clear, uniform, and easy to comprehend require”所接的宾语从句中谓语动词应用 should+动词原 形,或只用动词原形。 e.g. Our teacher requires that we(should) practice speaking as much as possible My parents required that i get rid of drinkingwhen it comes to :on the subject of, when one is dealing with something e.g. When it comes to playing the piano, you should consult George. When it comes to talking with native English speakers, I am almost at sea. 2. That was the reason behind an experimental project by the US Department of Transportation. That was why the US Department of Transportation performed an experimental project. 3.…as an aid to Americans and their guests from abroad. … as a means of help to Americans and their foreign guests. 4.William R. Meyers, who directs the project, requires that signs be clear, uniform, and easy to comprehend. William R. Meyers, who is the director of the project, requires that that signs (should) be clear, uniform, and easy to comprehend. “require”所接的宾语从句中谓语动词应用 should+动词原 形，或只用动词原形。 e.g. Our teacher requires that we (should ) practice speaking as much as possible. My parents required that I get rid of drinking