英语区分!try to do和try doing may be和maybe

1.试图;努力[+to-v] We'll try to improve our teaching methods.我们要设法改进教学方法.2.尝试,试行[+v-ing] Let's try knocking at the back door.咱们敲后边的门试试.may be,maybe may be和maybe一分一合,但它们...