dress up as a clown(装扮成一个小丑)
walk through the city (throw加立体)
cross the road (cross加平面物体)
safety 安全
safe 安全的
safely 安全地
cross the road (动副结构)
see you easily (动副结构)
to keep safe (系动词加形容词)
stay safe (系动词加形容词)
come with me=I want to come with you
Do you want to come with me=Would you like to come with me
名词变复数：
1.直接加s
2.以x、s 、ch 、sh，结尾加es
3.部分以o结尾加es (hero，mango，tomato，potato)
