Change the forms of the following sentences. 句型轉(zhuǎn)換。
1. I like trips in the car.(改為否定句) 2. The tortoise is walking down a road.(對畫線部分提問) 3. The pencil is in the desk.(對畫線部分提問) 4. An elephant is bigger than a tiger.(改為同義句) 5. I don't know. Where's my sword?(連為復合句)