To his joy,Henry got many presents on his birthday.

可以翻译为：令亨利高兴的是,在他生日的时候收到了很多礼物．同义句是：Henry was cheered by many presents on his birthday。简单点可以说：Henry was happy because he get many presents on his birthay。也可以说:Henry was very glad that he have get many presents on his birthday。这样的同义句太多了。